求教各位大神关于虚拟语气倒装的问题

scottshen

直接上题
If anyone at InterCom Financial Advisers would have anticipated, or even suspected, the impending sale of the Koniko kelp processing plant, they would have advised owners of Koniko stock to unload all shares immediately.B

(A) If anyone at InterCom Financial Advisers would have anticipated

(B) Had anyone at InterCom Financial Advisers anticipated

(C) If any people at InterCom Financial Advisers would have anticipated

(D) If any people at InterCom Financial Advisers had anticipated（D）

(E)If anybody at InterCom Financial Advisers anticipated
B和D的区别在哪里啊，求教各位大神，感激不尽！
BTW,哪位有distinguish，differentiate，discriminate等等这样的词的固定搭配啊，between...and和from这样的选项我老选不对，感激不尽了啊！

scottshen

顶啊顶，还是不明白啊