—  Thank you very much for helping me when I was in trouble.

—  _____.  [ ]

A. Don't mention it

B. With pleasure

C. That's right  

D. You said it

以下函数 sstrcat()的功能是实现字符串的连接，即将 t 所指字符串复制到 s 所指 字符串的尾部。例如：s 所指字符串为 abcd，t 所指字符串为 efgh，函数调用后s 所指字符串为 abcdefgh。请填空。#include voidsstrcat(char*s,char*t){ intn;n=strlen(s);while(*(s+n)=_________){s++; t++;}}