What will the following C++ code print?

#include <iostream>
using namespace std;
int factorial(int n)
{
    if (n == 0)
        return 1;
    return n * factorial(n - 1);
}
int main()
{
    cout << factorial(0);
    return 0;
}
                        

Options

• B. 1
• C. Undefined reference
• D. More than one of the above
• E. None of the above