In the following cases, which one is the example of conveying the original meaning from the opposite angle?
A、他姓什么我一时说不上来。 I just can't recall what his name is.
B、他们花费了半天打扫屋子。They spent the whole morning/afternoon cleaning the house.
C、哪儿脚疼，穿鞋的人最清楚。No one knows where the shoe pinches like the wearer.
D、/