Q. What is the output of this program?

#include 
    using namespace std;
    long fact (long p)
    {
        if (p > 1)
            return (p * fact (p + 1));
        else
            return (1);
    }
    int main ()
    {
        long n = 6;
        cout << n << "! = " << fact ( n );
        return 0;
    }

• (A) 1
• (B) 6
• (C) segmentation fault
• (D) compile time error