单选题 Scientists hope the collision will produce a large crater in the comet's surface in order to reveal the core and give some ______ to the origin of the solar system.
【正确答案】 C
【答案解析】考名词和介词to的搭配。句子是一个主从复合句,在从句中又有一个并列的目的状语。sources是“来源,出处”,一般与of搭配;interpretations是“解释,说明;翻译”,也是与of搭配;clues是“线索;暗示”;observations(复数)是“观察资料;(观察后的)意见”。故从搭配和含义上都应该选clues。