免责条款是指当事人在合同中约定的，排除或限制其违约责任的条款，其特征是包括（）。

A.约定性

B.预先性

C.明示性

D.强制性

E.免责性

A: Excuse me, Mr. Smith, but are you free this evening
B：().

A. Well, I’m afraid whether I will be free or not has little to do with you.

B. Yes, welcome to my home this evening.

C. Sorry, I don’t like to be asked such a private question.

D. I’m sorry , I have an appointment at seven.