在谈判期间，采用声东击西策略的目的在于( )。

A．缓和谈判气氛，增加解决问题的方案
B．分散对方的注意力，转移对方的视线
C．在己方不重要的问题上作出让步，造成对方心理上的满足
D．以其人之道，还治其人之身
E．给对方造成压力，通过让步达成协议

It was now clear that no such weapons were manufactured and none been found.()

A. was found

B. were founded

C. has been found

D. have been founded