and the problem could be settled.A. A bit more effortB. To make more effortC. Making more

问题补充：

and the problem could be settled.

A. A bit more effort

B. To make more effort

C. Making more effort

D. If you make more effort

答案：

(答案→)A. A bit more effort

B. To make more effort

C. Making more effort

D. If you make more effort

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