Q. What is the output of this program?

#include <iostream>
    #include <iomanip>
    using namespace std;
    void showDate(int mm, int dd, int yy)
    {
        cout << setfill('0');
        cout << setw(2) << mm << '/'
        << setw(2) << dd << '/'
        << setw(4) << yy << endl;
    }
    int main()
    {
        showDate(1, 1, 2019);
        return 0;
    }

• (A) 01
• (B) 02
• (C) 2019
• (D) 01/01/2019