prep1-217 A中的that是什么成分

217.      (30418-!-item-!-188;#058&005391)       (T-3-Q17. ��ɽ-7-14)

Not one of the potential investors is expected to make an offer to buy First Interstate Bank until a merger agreement is signed that includes a provision for penalties if the deal were not to be concluded.

A. is expected to make an offer to buy First Interstate Bank until a merger agreement is signed that includes a provision for penalties if the deal were

B. is expected to make an offer for buying First Interstate Bank until they sign a merger agreement including a provision for penalties if the deal was

C. is expected to make an offer to buy First Interstate Bank until a merger agreement be signed by them with a provision for penalties if the deal were

D. are expected to make an offer for buying First Interstate Bank until it signs a merger agreement with a provision for penalties included if the deal was

E. are expected to be making an offer to buy First Interstate Bank until they sign a merger agreement including a provision for penalties if the deal were

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正解A。

我不明白A中 that includes a provision for penalties 做的是什么成分，that可以引导名词性从句或者宾语从句。但是此处that前面为is signed是动词，显然不是名词性从句；is signed为被动语态，好像that也不能引导宾语从句吧~ 请NN帮忙解释一下

有NN能够帮忙解释一下的吗，不胜感激！！

This one is tricky.

1---make an offer to do

2---none of them is...

3---subjunctive---provision for penalties if the deal were not to be concluded

4---that refers to the agreement