—Shall we run around the park or go for a bike ride?

—______. They are both good activities.

A．That’s all right

B．It makes no difference to me

C．Yes, I like them very much

D．I’d prefer a bike ride

抛物线y²=4x的焦点为F，准线为l，则过点F和M（4，4）且与准线l相切的圆的个数是（　　）

A．0

B．1

C．2

D．4