Which Of The Following Statements About Interfaces Is True?

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Which Of The Following Statements About Interfaces Is True?

Select one: a. You can define an interface variable that refers to an object of any class in the same package. b. You cannot define a variable whose type is an interface. c. You can instantiate an object from an interface class. d. you can define an interface variable that refers to an object only if the object belongs to a class that implements the interface.
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d. you can define an interface variable that refers to an object only if the object belongs to a class that implements the interface.
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