I wonder _____ there are so many natural disasters across the world. [ ]

A. why is it that

B. what is it that

C. what it is that

D. why it is that

佛像的胸间往往有右旋“卐”或左旋“卍”的图案，称为（）。

A.万解

B.万字符

C.法轮

D.轮宝