What will be the output of the following C code?

#include <stdio.h>
union stu
{
    int ival;
    float fval;
};
void main()
{
    union stu r;
    r.ival = 5;
    printf("%d", r.ival);
}

A. struct B. record C. class D. object

A. Variables B. Properties C. Objects D. Elements

A. Function B. Another structure C. Enumeration D. All of the above

A. . (dot) B. -> (arrow) C. :: (scope) D. , (comma)