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单选题
Which Man class properly represents the relationship “Man has a best friend who is a Dog”?()
A

 class Man extends Dog { }

B

 class Man implements Dog { }

C

 class Man { private BestFriend dog; }

D

 class Man { private Dog bestFriend; }

E

 class Man { private Dog }

F

 class Man { private BestFriend }


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