单选题 She was often oblivious of the potential consequences of her action.

【正确答案】 A

【答案解析】oblivious健忘的；unaware无意识的；confident自信的；afraid害怕的；convinced深信的。此句句意“她常常茫然不知她的行为所带来的后果。”所以A选项最符合题意。