987的172like和as的用法

Because young children do not organize their attention or perceptions systenatically, like adults, they may notice and remember details that their elders ignore.

B, unlike an adult

C, as adults do

D,as an adult

E,as adult

这道题的answer：as adults do，但是我正确答案应该是unlike adults，可是选项里没有。退一步说，我觉得如果like前面没有“，”的话，as adults do 就对了。大家说呢？