Comment on the output of the following C code.

#include <stdio.h>
int main()
{
    int i, n, a = 4;
    scanf("%d", &n);
    for (i = 0; i < n; i++)
        a = a * 2;
}

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;