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

#include <iostream>  
using namespace std;
class A{
public:
	int a;
	A(){
		cout<<"Constructor called\n";
	}
} a;
int main(int argc, char const *argv[])
{
	cout<<"Main function\n";
	return 0;
}

A. A function used to create objects B. A special member function that initializes objects C. A function used to access class members D. None of the above

A. friend B. protected C. public D. private

A. A compilation error occurs B. The class cannot be instantiated C. The class is initialized with default values D. A default constructor is provided by the compiler

A. A special member function that destroys objects B. A function used to create objects C. A function used to initialize objects D. A function used to access class members