Given concrete class B is a subclass of concrete class A, and class A implements interface C,
which two are examples of polymorphism? (Choose two.)
A.
use a reference variable of type C to refer to an instance of type B
B.
use a reference variable of type A to refer to an instance of type C
C.
use a reference variable of type C to refer to an instance of type A
D.
use a reference variable of type A to refer to an instance of type B
E.
use a reference variable of type B to refer to an instance of type A