Comment on the behaviour of the following C code?

#include <stdio.h>
int main()
{
    int i = 2;
    i = i++ + i;
    printf("%d\n", i);
}

A. Declare a variable B. Declare a function C. Define a function D. Assign a value

A. . B. ; C. : D. ,

A. char B. int C. float D. double

A. int variable_name; B. variable_name = 5; C. variable_name int; D. int = variable_name;