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If class Dog has a subclass Retriever, which of the following is true? a . The relationship between these classes implies that Dog ' is
If class Dog has a subclass Retriever, which of the following is true?
a The relationship between these classes implies that Dog isa Retriever.
b The relationship between these classes implies that Retriever 'hasa Dog.
c Because of single inheritance, Retriever can extend no other class except Dog.
d Because of single inheritance, Dog can have no other subclasses.
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