My grandfather is fon’d of talking about good old days, _____is often the case with old people.

A．when

B．as

C．that

D．what

相对于Adobe Photoshop CS，下面的模糊方式中，哪个是After Effects 6.0的模糊（Blur）方式所特有的：（）

A.Channel Blur

B.Directional Blur

C.Gaussian Blur

D.Radial Blur