— I happened to notice Bob's father quarrelling with the teacher in defense of his son.  

— No wonder Bob always performs poorly in class. It's really "_______".

A .  Love me ,  love my dog          

B .  Like father,   like son

C.   Birds of a feather flock together  

D .  A busy mother makes a lazy daughter

以下程序中函数scmp的功能是返回形参指针s1和s2所指字符串中较小字符串的首地址。
#include＜string＞
char*scmp(char*s1,char*s2)

if(strcmp(s1,s2)＜0)
return(s1)；
else retrun(s2)；

main()

int i；char string[20],str[3][20]；
for(i=0；i＜3；i++)gets(str[i])；
strcpy(string,scmp(str[0]，str[1])；//库函数strcpy对字符串进行复制
strcpy(string,scmp(string,str[2]))；
puts(string)

若运行时依次输出：abcd、abba和abc三个字符串，则输出结果为( )。

A．abcd

B．abba

C．abc

D．abca