84. Plausible though it sounds, the weakness of the hypothesis is that it does not incorporate all relevant evidence.

(A) Plausible though it sounds, the weakness of the hypothesis

(B) Even though it sounds plausible, the weakness of the hypothesis

(C) Though plausible, the hypothesis’ weakness

(D) Though the hypothesis sounds plausible, its weakness（D）

(E) The weakness of the hypothesis which sounds plausible

请问a为什么不对?

it指代the hypothesis，在A中指代不清---就是在逻辑上可以指代，在表达上D比A好.

对呀

一语点醒梦中人,我快考了,其实概念脑子里都有,就是不知为什么,特别混乱

你一提醒,我觉得没错啊,it从形式上看应该指代主句主语就是weakness,而逻辑上应该时代hyposis