单选题：已知类的继承关系如下：

已知类的继承关系如下：

class Employee;

class Manager extends Employee;

class Director extends Employee;

则以下语句哪个能通过编译？ ( )。

@[A](2)

A. Employee e = new Manager();
B. Manager m = new Director();
C. Director d = new Manager();
D. Director d = new Employee();



A.Employee e = new Manager();
B.Manager m = new Director();
C.Director d = new Manager();
D.Director d = new Employee();


答案：A