A reference is capable of referring to which of the following? Select all that apply. An instance of a superclass of the reference An instance of the same type as the reference An instance of a subclass of the reference A reference can refer to any type of object A reference that is referring to a subclass object can directly access any of the public members of the subclass. True O False The Java operator that can be used to determine what type of object a reference is referring to at runtime is: O objecttype istype instanceof isa When a reference is referring to a subclass object, and calls upon a method that is overridden in the subclass, the implementation that will be executed is the one defined in the subclass. O True O False