that's all right 和 it's all right 的区别

问题描述:

that's all right 和 it's all right 的区别
Thank you for joining in our conversation tonight.
A. with pleasure
B. don't say so
C. that's all right
D. it's all right
我们英语作业要订正 还要写为什么
这题为什么要选C而不选D呢?

C的意思是“不用谢、不客气”
D的意思是“那是对的”