There are two major problems linked with atomic power plants,the first ___ concerns nuclear waste.
问题描述：
There are two major problems linked with atomic power plants,the first ___ concerns nuclear waste.
A.of both
B.of whom
C.of which
D.of the two
请问选哪个?选和不选的原因?顺便把句子翻译成中文.
答
选C
考察定语从句.which 指代 two major problems 表示,其中的., 那一个.
【核电站有两个主要问题,其中第一个就是关于核能的浪费.】