A. In areas with high altitudes such as the Swiss Alps, air pressure is low, and oxygen is scarce.

B. In areas with high altitudes, such as the Swiss Alps, air pressure is low and oxygen is scarce.

C. In areas with high altitudes, such as the Swiss Alps, air pressure is low, and oxygen is scarce.

D. In areas with high altitudes such as the Swiss Alps air pressure is low and oxygen is scarce.

E. None of the above

A. Fascinated, Amanda wanted to run her fingers over the ancient, rock carving, but she remembered that touching the petroglyphs is not allowed.

B. Fascinated, Amanda wanted to run her fingers over the ancient rock carving, but she remembered that touching the petroglyphs is not allowed.

C. Fascinated, Amanda wanted to run her fingers over the ancient, rock carving but she remembered that touching the petroglyphs is not allowed.

D. Fascinated Amanda wanted to run her fingers over the ancient rock carving, but she remembered that touching the petroglyphs is not allowed.

E. None of the above

A. Before baking bread, Sophie cleans the counter, and measures all the ingredients.

B. Before baking bread, Sophie cleans the counter and measures all the ingredients.

C. Sophie cleans the counter and measures all the ingredients before baking bread.

D. Before baking bread Sophie cleans the counter, and measures all the ingredients.

Both B and C

A. Yes I'm aware that birds, that have scales on their legs, probably evolved from reptiles.

B. Yes I'm aware that birds that have scales on their legs probably evolved from reptiles.

C. Yes, I'm aware that birds, that have scales on their legs, probably evolved from reptiles.

D. Yes, I'm aware that birds that have scales on their legs probably evolved from reptiles.

E. Both B and D

A. On June 15, 2020 we will move to Nicaragua for a year because my father will teach at a university there.

B. On June 15, 2020, we will move to Nicaragua for a year because my father will teach at a university there.

C. On June 15, 2020, we will move to Nicaragua for a year, because my father will teach at a university there.

D. Both A and B

E. None of the above

A. Josephine Arturo, M.D., the most experienced ear, nose, and throat doctor at the clinic, will help me stop snoring.

B. Josephine Arturo M.D., the most experienced ear, nose, and throat doctor at the clinic, will help me stop snoring.

C. Josephine Arturo, M.D., the most experienced ear nose and throat doctor at the clinic, will help me stop snoring.

D. Josephine Arturo, M.D., the most experienced ear, nose, and throat doctor at the clinic will help me stop snoring.

E. None of the above

A. My sister, Emily, who played varsity softball in college, is going to be our new coach.

B. My sister Emily, who played varsity softball in college, is going to be our new coach.

C. My sister Emily who played varsity softball in college is going to be our new coach.

D. My sister Emily who played varsity softball in college, is going to be our new coach.

E. None of the above

A. Compared to some other animals, human beings have a poor sense of smell; however we can still distinguish between many different odors.

B. Compared to some other animals, human beings have a poor sense of smell, however, we can still distinguish between many different odors.

C. Compared to some other animals human beings have a poor sense of smell; however, we can still distinguish between many different odors.

D. Compared to some other animals, human beings have a poor sense of smell; however, we can still distinguish between many different odors.

E. Both A and B

A. There was a brief flurry of fluffy white snow, then it began to drizzle.

B. There was a brief flurry of fluffy, white snow, then it began to drizzle.

C. There was a brief flurry of fluffy, white snow, but then it began to drizzle.

D. There was a brief flurry of fluffy, white snow; then it began to drizzle.

Both C and D