Could you help me with my physics, please?请问你能帮我做物理课作业吗？( )很抱歉不

Could you help me with my physics, please?请问你能帮我做物理课作业吗？( )很抱歉不行。我马上要去开会。（表示歉意要婉转，不能直接说 NO 还应加理由）

A.No, no way

B.No, I couldn’t

C.No, I can’t

D.Sorry I can’t. I have to go to a meeting right now

正确答案是D