Explain, Please... Output is b How?

Question

#include <iostream>
using namespace std;
class A {};
class B : public A {};
class C : public B {};
void method(A a) {cout<<'a';}
void method(B b) {cout<<'b';}
int main() {
C c;
method(c);
return 0;
}

//Output is b

Answer 1

Hmmm... i see got it...