还要麻烦大家一题，走过路过的都进来看看吧

AmyGMAT

1.       Federalauthorities involved in the investigation have found the local witnesses aredifficult to locate, reticent, and are suspicious of strangers.
(A)the local witnesses are difficult to locate, reticent, and are
(B)local witnesses to be difficult to locate, reticent, and are
(C)that local witnesses are difficult to locate, reticent, and
(D)local witnesses are difficult to locate and reticent, and they are（C）
(E)that local witnesses are difficult to locate and reticent, and they are


答案是C 可是locate是动词，剩下两个都是形容词，怎么可以并列呢？球解答。

AmyGMAT

my god 我明白了。。。