--What do you want to do next?We have half an hour until the baseball game.

---_____.Whatever you want to do is fine with me.

A．It just depends

B．It’s up to you

C．All right

D．Glad to hear that

试在曲线族y=a(1-x²)(a＞0)中选一条曲线，使这条曲线与其在(-1，0)及(1，0)两点处的法线所围成图形的面积，比这族曲线中其他曲线以同样方法围成图形的面积都小．