885，sec15，21 ???

21.   roponents of artificial intelligence say they will be able to make computers that can understand English and other human languages, recognize objects, and reason as an expert does—computers that will be used to diagnose equipment breakdowns, deciding whether to authorize a loan, or other purposes such as these.

(A) as an expert does—computers that will be used to diagnose equipment breakdowns, deciding whether to authorize a loan, or other purposes such as these

(B) as an expert does, which may be used for purposes such as diagnosing equipment breakdowns or deciding whether to authorize a loan

(C) like an expert—computers that will be used for such purposes as diagnosing equipment breakdowns or deciding whether to authorize a loan

(D) like an expert, the use of which would be for purposes like the diagnosis of equipment breakdowns or the decision whether or not a loan should be authorized（C）

(E) like an expert, to be used to diagnose equipment breakdowns, deciding whether to authorize a loan or not, or the like

不是说like 是比较名词么? 这里c怎么还原回句子成了 computers reson like a expert ?????  栽在这上面了

我觉得分号后面 是单独的句子 解释前面的内容

所以 like 还是比较名词的