Because of the confidential nature of the deal. I was not ______

Because of the confidential nature of the deal. I was not ______ to announce it.
A、supposed
B、happy
C、prevented
D、reluctant
【正确答案】：A
【题目解析】：A:应该  B:快乐  C:预防  D:不情愿 
句意：因为交易的机密性， 我不应该宣布的。根据句意选A.