Several Pro-Choice Advocates Want to Address an Anti-Abortion Rally and Convince

Several pro-choice advocates want to address an anti-abortion rally and convince the crowd of their viewpoint. They should understand that generally, people

A) change in small increments over a long period of time.
B) almost never change attitudes or beliefs no matter what.
C) are more easily persuaded on major issues than minor ones.
D) often reverse their opinion on the spot if the speaker is good enough.