下面程序# include # includemain(){char * p1＝"abc"，* p2＝"ABC"，str[50]＝"xyz"；strcpy(str＋2，strcat(p1，p2))；printf("%s\n"，str)；}输出结果是( )
A.xyzabcABC
B.zabcABC
C.yzabcABC
D.xyabcABC