有权批准期货交易所设立的机关是（）。

A．国家发展和改革委员会

B．中国银监会

C．国家工商行政管理总局

D．中国证监会

You have been towing astern and have just let go the tow.Your deckhands are pulling in and faking the towline by hand on the stern.The most dangerous action to take is to（）.

A.continue ahead at slow speed

B.continue ahead at half speed

C.stop your engines

D.back down on your engines