若函数y=f（x）的定义域是[-2，4]，则函数g（x）=f（x）+f（-x）的定义域是（　　）

A．[-4，2]

B．[-2，2]

C．[-2，4]

D．[-4，-2]

.He asked ____any elephants in the zoo the day before.

A,if did you see          B,if you had seen 

C,whether did you see     D,that you had seen