The introduction of vaccines to the United States helped--

• limit the risk in consuming imported produce
• improve the hygiene of medical procedures
• improve the quality of the water supply
• limit the spread of infectious diseases

Jackie Robinson first rose to national prominence in the late 1940's when he--

• organized sit-ins to desegregate lunch counters
• enrolled in the racially segregated University of Mississippi
• helped bring an end to racial segregation in Major League Baseball
• participated in the Freedom Rides to desegregated interstate bus terminals

Senator Joseph McCarthy is best known for his involvement in--

• the war effort of the 1940's
• the Red Scare of the 1950's
• the Civil Rights movement of the 1960's
• the political scandals of the 1970's

The government issued ration books during WWII in order to--

• provide financial security for uninsured citizens
• safeguard the profits of struggling businesses
• ensure the fair distribution of scarce goods
• allow consumers to buy imported goods at discounted rates

The primary reason given by U.S. leaders to justify military involvement in Vietnam was that it would--

• promote reconstruction after WWII
• maintain the policy of detente
• fulfill prior United Nations obligations
• keep communism from spreading throughout the region

Which of these was a major goal of Jane Addams's Settlement House movement in Chicago?

• The founding of women's colleges
• The introduction of prison reform
• The assimilation of immigrants 
• The establishment of public libraries 

During the nineteenth century, one way political bosses gained voter support was by--

• campaigning for women's suffrage
• advocating the use of poll taxes
• making improvements in urban infrastructure 
• providing public assistance for former slaves 

Which of these in an effect rock and roll had on society in the United States in the 1950's? 

• It reminded people of prewar days
• It contributed to a cultural divide between generations
• It increased the fear of communist expansion
• It promoted values learned during times of economic hardship

During the 1920's, what was one result of innovations in U.S. transportation technology?

• Commercial airplanes replaced ocean liners as the primary means of travel to Europe
• Mass-produced automobiles made travel more affordable for many people
• Cable cars provided a comfortable means of quick travel to any city within a state
• Container ships delivered agricultural goods to ports along the Pacific coast

Under the U.S. Constitution, the government may not take private property unless--

• the land requires extensive restoration
• the government determines that the land is critical to developers' profits
• the landowner refuses to build a home on the land
• the government pays the owner fair compensation for the land