【单选题】给定如图所示的车辆类 Vehicle 和可驾驶的 Drivable 接口之间的关系: 有关类和接口定义的代码如下: public interface Drivable{ } public class Vehicle{ } public class Car extends Vehicle implements Drivable{ } public class Truck extends Vehicl...
A.
Car car = new Car(); Vehicle vehicle = car;
B.
Tank tank = new Tank(); Vehicle vehicle = tank;
C.
Drivable drivable = new Tank(); Object o = drivable;
D.
Vehicle vehicle = new Vehicle(); Object o = vehicle;