，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
网友回答
(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。