题目内容
(请给出正确答案)
[单选题]
已知类的继承关系如下:classEmployee;classManagerextendsEmployeer;classDirectorextendsEmployee;则以下哪个语句能通过编译?()
A.Employeee=newManager();
B.Directord=newManager();
C.Directord=newEmployee();
D.Managerm=newDirector();
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