— I am sorry for what I have said to you.
—_____________

选择一项：

A.
No problem.


B.
I.m sure about that.


C.
Don.t think any more about it.

解析：本题考核“表达道歉”的交际用语。答语一般使用Never mind/ That's OK/ It can't be helped/ Don't think any more about it等句型表达原谅。根据第一说话人包含的信息，确定是道歉，所以答案是C。 正确答案是：Don't think any more about it.