At last Bob became _____ the danger of smoking and ?decided? to give it up. [ ]

A.aware                  

B.aware of

C.aware with

D.aware that

银行客户经理小杨与其客户小陈在一次交谈中无意得知小陈想变更其资金投资方向，次日小杨直接按照小陈希望的投资方向进行变更，这种做法是正确的。( )