我国唐朝的张志和在《玄贞子》中记载了著名的“人工彩虹”实验：“背日喷乎水，成虹霓之状．”该现象产生的原因是 

A．光的直线传播

B．光的漫反射

C．光的镜面反射

D．光的折射

  ____ the storm on the sea,it is reported that the president has put off the trip.

A．thanks to

B．because of

C．due to

D．as a result