M: What a great singer Justin is! His concert is just awesome. And you’ll never regret the money you paid for the ticket.
W: Yeah. Judging by the amount of the applause, everyone was enjoying it.

What are the two speakers talking about（）

A. some gene plays an important role in human beings
B. people with sad childhood will become violent
C. one kind of gene is the most important in human body
D. some gene functions partly in violence in men with miserable childhood

A. Seeking passers-by’s help.
B. Trying to stand up.
C. Looking for something.
D. Calling the police.