按照《建筑边坡工程技术规范》(GB50330—2002)规定，下列哪些建筑边坡可不进行稳定性评价()。

A.选作建筑场地的自然边坡

B.由于开挖或填筑形成井需要进行稳定性验算的边坡

C.施工期未出现不利工况的边坡

D.使用条件发生变化的边坡

A group of 7 fishermen chartered a boat for a day to fish for flounder. The boat costs x dollars per day to rent. If the group can find 3 more fishermen on the docks who are willing to come aboard and share the rental costs, how much less will the rental cost be per person in terms of x ？（）

A. x/70

B. x/35

C. 3x/70

D. 3x/10

E. 3x/7