What he said just now had little to do with the question discussion. A onB in C under D

问题补充：

What he said just now had little to do with the question discussion.

A onB in C under D at

答案：

解析：考查介词。本题考查固定短语用法under discussion“在讨论中”。句意：他刚才说的话和正在讨论的问题关系不大。故C正确。