-__________ is the Olympic Games in London?

-__________ 2012.[ ]

A. How old, In

B. When, In

C. What, In

设变量a、b、c、d和y都已正确定义并赋值。若有下列if语句
if(a＜B)
if(c= =D) y=0;
else y=1;
该语句所表示的含义是( )。