问一道换题后的SC

5．My first questionI’m sure I can memorise this question without mistake) 秦始皇 B(united several states that constituted China into) 统一的国家        C(united several states constituting China as) I look up dictionary after the test, Unite sth In sth

上面这道JJ, NN们认为选哪个呢？

多谢讨论！

另，还有一道说考固定用法thrift with和thrift for...

很奇怪的说，NN们的高见？