Upon successful execution of the following program, how many different copies of the variable x are there? and what are their values when their process finishes? Verify your answers by running program. #include #include pid_t c; int main() { c = fork(); int x = 5; if (c == 0) X += 5; else { c = fork(); x += 10; if (c) X += 5; } return 0; } O One for main, it finishes with x - 20. One for the first child of main, it finishes with x 10. One for the second child of main, it finishes with x 15. One for main, it finishes with x = 20. One for the first child of main, it finishes with x = 15. One for the second child of main, it finishes with x = 10. O O One for main, it finishes with x = 10. One for the first child of main, it finishes with x 15. One for the second child of main, it finishes with x = 10. =