What will be the output of the following C code?

#include <stdio.h>
int foo(int, int);
#define foo(x, y) x / y + x
int main()
{
   int i = -6, j = 3;
   printf("%d ",foo(i + j, 3));
   #undef foo
   printf("%d\n",foo(i + j, 3));
}
int foo(int x, int y)
{
   return x / y + x;
}

A. Decision making B. Variable declaration C. Code organization and reusability D. Printing output

A. To declare a function's return type B. To declare a function's name C. To declare a function's parameters and return type D. To declare a function's name and parameters

A. 4 B. 8 C. 2 D. Error

A. By value B. By reference C. By pointer D. By address