Semicolons

After leaving the Capitol _______ Senator Dubitsky returned to her office to work on a speech, answer some letters, and meet with her staff.

• comma
• semicolon
• no punctuation

Juanita usually prefers to work out in the morning ___________  today she intends to go to the gym after her last appointment.

• comma
• semicolon
• no punctuation

I chose to start a diet after Thanksgiving ________ because holiday food is just too good!

• comma
• semicolon
• no punctuation