【正确答案】 C

【答案解析】[解析] “疑问词+不定式”在句中作宾语。例如：It does not take much strength to do things, but it requires great strength to decide on what to do. 做事并不太费劲，可是决定做什么却要费很大的劲。The art of being wise is the art of knowing what to overlook. 智慧的艺术就是懂得该宽容什么的艺术。