设已经在窗体上添加了一个通用对话框控件CommonDialog1,以下正确的语句是
A.CommonDialog1.Filter=AllFiles|*.*|Pictures(*.Bm|*.Bmp
B.CommonDialog1.Filter="AllFiles"|*.*|Pictures(*.Bm|*.Bmp
C.CommonDialog1.Filter=(AllFiles|*,*|Pictures(*.Bm|*.Bm
D.CommonDialog1.Filter="AllFiles|*.*|Pictures(*.Bm|*.Bmp"