and the problem would be straightened out.A. A bit more effortB. Having a little effortC.

问题补充：

，and the problem would be straightened out.

A. A bit more effort

B. Having a little effort

C. If you have a bit more effort

D. There being a little effort

答案：

(答案→)A. A bit more effort

B. Having a little effort

C. If you have a bit more effort

D. There being a little effort

解析：考查句型：名词短语/祈使句+and/or+结尾句。如选C项，应去掉题干中的连词and。