这道gwd题答案不一，大家发现了吗？

Q17:

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     这个题答案到底是a还是c啊，gwd上有的写是a有的写是c。我觉得应该是c

个人认为A. on condition that + should 省略.

agree, subjunctive mood..

on condition that (shoud) do sth....should is omitted here...pay attention