Jokes were a natural self-defense mechanism against the （ ）of da

Jokes were a natural self-defense mechanism against the （ ）of daily life.
A、tedium
B、conviction
C、charm
D、diversion
【正确答案】：A
【题目解析】：tedium n. 单调，乏味E.g. She longed for something to relieve the tedium of everyday life.她渴望有什么事情能排解她日常生活中的烦闷。句意：玩笑是对抗无聊日常生活的一种正常的自我防御机制。