987-24请教 时态问题

renee860615

1.      A recent study has found thatwithin the past few years, many doctors had elected early retirement ratherthan face the threats of lawsuits and the rising costs of malpracticeinsurance.
(A) had electedearly retirement rather than face
(B) had elected earlyretirement instead of facing
(C) have electedretiring early instead of facing
(D) have electedto retire early rather than facing（E）
(E) have electedto retire early rather than face


答案是E, 想不通为什么用现在完成时？？前面“has found"已经是一个完成时了，难道后面不应该是一个过去完成时吗？请教

brianfang

这是哪里的题啊