求助

6.   (24841-!-item-!-188;#058&001528)

The list of animals that exhibits a preference of either using the right or the left hand (i.e., claw, paw, or foot) has been expanded to include the lower vertebrates.

(A) exhibits a preference of either using the right or the left hand (i.e., claw, paw, or foot) has been expanded to include

(B) exhibits the preference to use either the right or the left hand (i.e., claw, paw, or foot) has been expanded and includes

(C) exhibit a preference in either using the right or the left hand (i.e., claw, paw, or foot) has been expanded to include

(D) exhibit a preference for using either the right or the left hand (i.e., claw, paw, or foot) has been expanded to include

(E) exhibit the preference as to either using the right or the left hand (i.e., claw, paw, or foot) has been expanded and includes

答案是D,我想问,不是OF 前面为主语吗,为什么不在AB里面选,还有如果是D,为什么后面用HAS  BEEN 啊这样主谓也不一致啊