The police were trying to _____ where the drug dealers were _____ it suddenly dawned upon them

that they might be hidden somewhere 10 miles within the border between the two countries. [ ]

A. come out; when  

B. make out; while  

C. figure out; when  

D. think out; since

二、统计表
根据以下资料，回答问题。

根据预测，15岁以下人口占总人口比重最少的年份是( )。

A．2005年

B．2030年

C．2070年

D．2090年