【正确答案】 C

【答案解析】[解析] 考点：定语从句。引导定语从句的关系代词可以作介词的宾语，形成带介词的定语从句。这种结构有两种：①从句由“介词+which/whom”构成；②从句由“名词(代词)+of/which/whom”构成。
[例句] Mt. Tai，the summit of which is hardly seen，is often covered with snow．
泰山终年积雪，其最高峰人迹罕至。