, I believe, and you will find the boy is very outgoing．

A．Having a talk with the student

B．One talk with the student

C．Given a talk with the student

D．If you have a talk with the student

甲将其电脑借给乙使用，乙却将该电脑卖给丙。依据我国《合同法》的规定，下列关于乙丙之间买卖电脑的合同效力的表述哪一是正确的

A．无效

B．有效

C． 效力待定

D．得变更或撤销