are typically passed to functions arepending if they are to be modified ence depending if they are to be modified d. by value only for following could be a legal call to an overloaded + operator? d. All of the above 29. Given an integer variable x, for which of the follo changed upon returning from the function? f (int val) a. f(x) with header void f(int) c. f(x) with header void f(int) *valpl a and b