Which of the following is true? a. You overload an operator by making it a parameter to a function. b. You should overload every C++ operator for each new class you create. c. To avoid confusion, you...

Which of the following is true?

a. You overload an operator by making it a parameter to a function.

b. You should overload every C++ operator for each new class you create.

c. To avoid confusion, you should not overload operators to carry out tasks that are similar

in meaning to the built-in version of the operator.

d. Operators that are normally defined to be only unary must remain unary when you

overload them.