Comment on the following 2 C programs.

#include <stdio.h> //Program 1
int main()
{
    int a;
    int b;
    int c;
}

#include <stdio.h> //Program 2
int main()
{
    int a;
    {
        int b;
    }
    {
        int c;
    }
}

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