TT 的一道改错题,答案不一样,请nn指教哪个才是正确答案

Several financial officers of the company spoke on condition that they not be named in the press reports.

1. that they not be named
2. that their names will not be used
3. that their names are not used
4. of not having their names
5. of not naming them

   Answer: a ?    c?

为什么呢?

不是NN，我的答案是C

Oxford Dictionary解释如下：

on condition (that)... only if; provided (that) 在...条件下; 倘若...: You can go out on condition that you wear an overcoat. 你要穿上外衣才能出去. on no condition (fml 文) not at all 一点也不; 决不: You must on no condition tell him what happened. 你决不能把发生的事情告诉他.

我觉得是a，原因是on condition that后面用虚拟语气，省略should

如果选c，为什么要用现在时态呢？前面明明是spoken，过去时啊

I see.

agree with you!