Either of them can take this job,but what I'm interested in is who is _____.

问题描述:

Either of them can take this job,but what I'm interested in is who is _____.
A.more careful
B.the most careful
C.carefully
D.even careful
能不能选B.

most是用于三者及以上人数的群体的*比较(最好的,最大的,etc.)
题目中的hint在于Either这个字,表明是两者间的比较,只能用A.比较级别more careful