_____ that you didn't care about this matter at all, I should not have wasted my time explaining it to you. [ ]

A. Should I realize

B. Had I realized

C. If I realized

D. Did I realized

根据《漂流旅游安全管理暂行办法》规定，对漂流旅游活动的管理实行的原则是（）。

A.属地管理原则

B.旅行社所在地原则

C.游客所在地原则

D.旅游合同签订地原则