单选题 根据下面的内容，回答题.

without losing face, and they will oblige you willingly.
People have been brainwashed since early at school to believe that

A．only those who are able to debate are intellectual.
B．debating is the best solution to disagreements.
C．the world is filled with war and conflict.
D．the adversarial training is necessary for everyone.

A．prove right from wrong.
B．confront an existing theory.
C．discuss with an open mind.
D．find an untouched topic.

A．when you see something unfair.
B．when you am annoyed at someone's extremely foolish behavior.
C．when you are enough with an arrogant person.
D．when you are in disagreement with your colleagues.