Although the increase in the present sum used for the research is， a great breakthrough co

Although the increase in the present sum used for the research is ， a great breakthrough could still be achieved by the end of this year.
A. common
B. sudden
C. enormous　
D. modest

A. commonB. suddenC. enormous　(答案→)D. modest解析：考查形容词辨析。modest不太大的。尽管目前用于研究的资金只是稍微有所增加，但今年年底我们仍可以有大的突破。

这个答案应该是对的