What will be the output of the following C++ code?

#include <iostream>
#include <string>
using namespace std;
class A
{
	float d;
    public:
	int a;
	void change(int i){
		a = i;
	}
	void value_of_a(){
		cout<<a;
	}
};
 
class B: public A
{
	int a = 15;
    public:
	void print(){
		cout<<a;
	}
};
 
int main(int argc, char const *argv[])
{
	B b;
	b.change(10);
	b.print();
	b.value_of_a();
 
	return 0;
}

A. 1010

B. 1510

C. 1515

D. 5110

Answer: Option B