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)

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

puts("they are Equal");
C．if(s1==s2)

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

puts("they are Equal");