Which statements concerning the event model of the AWT are true？（） A、At most one listener of each type can be registered with a component.B、Mouse motion listeners can be registered on a List instance.C、There exists a class named ContainerEvent in package java.awt.event.D、There exists a class named MouseMotionEvent in package java.awt.event.E、There exists a class named ActionAdapter in package java.awt.event.
Which statements concerning the event model of the AWT are true？（）
- A、At most one listener of each type can be registered with a component.
- B、Mouse motion listeners can be registered on a List instance.
- C、There exists a class named ContainerEvent in package java.awt.event.
- D、There exists a class named MouseMotionEvent in package java.awt.event.
- E、There exists a class named ActionAdapter in package java.awt.event.
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