Which sentence best describes the difference between the statements?

The answer is A, because when you read the first sentence speaker 1 is talking about how bikes are safer. And speaker 2 is saying cars are the biggest source of population. They are talking two about completely different things, therefore the answer is A

The answer is THEY ARE BEING PRESENTED TO DIFFERENT AUDIENCES.

answer; /// i believe the correct answer is (when one group has an extremely high score at pretest;

answer; john locke;