[求助]白勇P97（OG108）的错误及时态问题

Reporting that one of its many problems had been the recent extended sales slump in women’s apparel, the seven-store retailer said it would start a three-month liquidation sale in all of its stores.

(A) its many problems had been the recent

(B) its many problems has been the recently

(C) its many problems is the recently

(D) their many problems is the recent（A）

(E) their many problems had been the recent

偶明白此题涉及的修士歧义，但是偶不明白A，B的时态问题，在此题中白勇的书上p97上对B的解释怎么都是一样的“表示问题出现发生在措施的提出之前”？？B这样就不合逻辑，A同样就合逻辑了？？？这里的过去完成时如何判断的？

我对用HAD有疑问虽然有SAID.但是HAD是说在过去某个时间点前完成啊. 可是当他们SAID的时候,PROBLEM并没有停止存在,仍然BE 啊. 应当是用HAVE 啊. 请哪位NN能帮我解释一下，先谢谢了！！

我对用HAD有疑问虽然有SAID.但是HAD是说在过去某个时间点前完成啊. 可是当他们SAID的时候,PROBLEM并没有停止存在,仍然BE 啊. 应当是用HAVE 啊. 请哪位NN能帮我解释一下，先谢谢了！！

我对用HAD有疑问虽然有SAID.但是HAD是说在过去某个时间点前完成啊. 可是当他们SAID的时候,PROBLEM并没有停止存在,仍然BE 啊. 应当是用HAVE 啊. 请哪位NN能帮我解释一下，先谢谢了！！

Choice A is best: the singular pronoun its agrees in number with the singular noun referent retailer; the past perfect verb form had been is used appropriately to refer to action completed prior to the action of the simple past tense said; and the adjective recent correctly modifies the noun phrase extended sales slump. The adverb recently in choices B and C distorts the meaning of the sentence by illogically suggesting that what was recent was only the extension of the slump, and not the slump itself. In choices D and E, the plural pronoun their does not agree with the singular noun retailer.
  

搜过帖子可时态问题依然没有解决