Jokes were a natural self-defense mechanism against the (  

Jokes were a natural self-defense mechanism against the (   ) of daily life.
A、tedium
B、conviction
C、diversion
D、charm
【正确答案】：A
【题目解析】：tedium厌烦，单调乏味；conviction定罪，确信；diversion转移；charm魅力。句意：笑话是对付日常生活单调乏味的一种自然的自卫机制。