—What’s wrong with my computer, Jack?

—Let me have a check. OK, it works now.

—You mean, nothing wrong with it, ________ ?

A．is there

B．isn’t there

C．is it

D．isn’t it

中外合资经营企业增加注册资本，应当经合营各方协商一致，董事会会议通过后，向原登记管理机关办理注册资本的变更登记手续即可。( )