When I had a private chat with her. I found______(她的一些评论非常有说服力)。

A．Mexican economy depends very much on cars and factories
B．it is not wise enough to come up with effective measures
C．Mexicans are able to adapt themselves to the current emergency
D．Mexicans enjoy playing dangerous games with their health

A．He has learned a lot from his own mistakes.
B．He is quite experienced in training wild dogs.
C．He finds reward more effective than punishment.
D．He thinks it vital to master basic training skills.