【正确答案】 A

【答案解析】[解析]细节题。根据前后文“whereby dealers illegally arrange beforehand not to bid against each other but nominate one of themselves as the only bidder，in the hope of buying the goods at extremely low price．”“．．．the real auction sales take place privately after- wards among the dealers．”可知如果他们的非法活动不是成功的话，他们就不会自己私下里再拍卖。B选项不够完整，C、D选项是迷惑项。