Excuse me,do you mind if i open the window?B:___________.A No,don't mind B Of course not 选B答案A有什么错误?

Excuse me,do you mind if i open the window?B:___________.A No,don't mind B Of course not 选B答案A有什么错误?
Excuse me,do you mind if i open the window?B:___________.A No,don't mind B Of course not 选B
答案A有什么错误?

Excuse me,do you mind if i open the window?B:___________.A No,don't mind B Of course not 选B答案A有什么错误?
习惯用语,老外就是这么说的：Of course not
A是中国人的习惯：不,不介意.