A. shipwrecks presenting a deadly maze to divers B. shipwrecks holding potential accidents for divers C. divers taking a shot of whiskey underwater D. divers losing their senses in the course of diving 参考答案:D 答案解析:细节理解。第4段的第2、3句为我们解释了什么叫“whiskey factor”以及它所引起的后果:在水下失去知觉并导致致命事故、因此选项D)正确。