What is the output of this program?#include using namespace std; int add(int p, int q); int main() { int k = 7, L = 9; cout << add(k, L) << endl; return 0; } int add(int p, int q ) { int sum = p + q; p = 10; return p + q; }

• A. 7
• B. 9
• C. 10
• D. 19
• E. None of these