What type of data is holded by variable u int in the following C code?

#include <stdio.h>
union u_tag
{
    int ival;
    float fval;
    char *sval;
} u;

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)