As he was still not allowed to run a company, his wife became its （ ） head.

单项选择题设串s1=“ABCDEFG”，s2=“12345”，用字符数组从0下标位置存储，函数strcat(s, t)返回s和t串的连接串，strsub(s, i, j)返回串s中从第i个字符开始的连续j个字符组成的子串，strlen(s)返回串s的长度，则strcat(strsub(s1, 2, strlen(s2)), strsub(s1, strlen(s2),2))的结果是（ ）A.CDEFG12B.BCDEFG1C.CD12345D.CDEFGFG

单项选择题A faminine society at large is more -oriented___________.A、competition B、cooperation C、power D、concensus