下列语句中，在字符串s1和s2相等时显示"they are Equal"的是( )。

A．if(*s1＝＝*s2)

B．if(!strcmp(s1,s2))
puts("they are Equal"); puts("they are Equal");

C．if(s1＝＝s2)

D．if(strcmp(s1,s2))
Puts("they are Equal"); puts("they are Equal");