— How about starting work tomorrow?  

—Sorry, but I can't possibly start until Tuesday. ______?[ ]

A. Will that be OK

B. Is that a good idea

C. Do you think I'm right

D. Can't you agree with me

质量为m，半径为R的均质圆盘，绕垂直于图面的水平轴O转动，其角速度为w，在图示瞬时，角加速度为零，盘心C在其最低位置，此时将圆盘的惯性力系向O点简化，其惯性力主矢和惯性力主矩的大小分别为：（）

A.A

B.B

C.C

D.D