A．She is trying to persuade the man to attend the rock-climbing class.

B．She is trying to tell the man many students are interested in it.

C．She is trying to tell him the college doesn’t have any rock-climbing equipment.

D．She is trying to tell him there are no appropriate places for rock-climbing nearby.

在我国，会计档案定期保管的，其保管期限最长的是()。

A．1年

B．3年

C．5年

D．25年