Which statement about the pass-by-reference is NOT true?

a.Every time you pass a reference variable to a method, you also pass the object referred by the refenerece variable to the method.

b.In the pass-by-reference, only one object exists in the computer memory but are referred by more than one references.

c.'this' reference always refer to the object self.

d.The pass-by-reference is only used for reference variables.

e.If a method uses the reference variable as the argument, the method can return void.