题目

 “快乐向前冲”节目中有这样一种项目，选手需要借助悬挂在高处的绳飞跃到鸿沟对面的平台上，如果已知选手的质量为m，选手抓住绳由静止开始摆动，此时绳与竖直方向夹角为α，绳的悬挂点O距平台的竖直高度为H，绳长为l，不考虑空气阻力和绳的质量，下列说法正确的是（                     ）                                                                                               ---Tom is such a stupid student that he had failed in every exam.    ---Sorry, I won’t agree. He is ________ than stupid. A. lazier                  B. no lazier            C. more lazy         D. lazier rather