请教:大全7 Claims的用法

7.        A firm that specializes in the analysis of handwriting claims from a one-page writing sample that it can assess more than three hundred personality traits, including enthusiasm, imagination, and ambition.

(A) from a one-page writing sample that it can assess

(B) from a one-page writing sample it has the ability of assessing

(C) the ability, from a one-page writing sample, of assessing

(D) to be able, from a one-page writing sample, to assess（D）

(E) being able to assess, from a one-page writing sample,

我选了C,答案是D, 但是C也没错啊,无论从句子结构还是习惯用法,精简原则上来看.

为什么不是C呢?

这是OG117.

C: 1) ability of doing 错. 应是ability to do

2) claim the ability 错. claim that, claim to do 都可以