1. The reference type corresponds to the type in the variable declaration.

2. The object type corresponds to the type in the variable declaration.

3. The reference type determines which implementation is executed for overloaded methods.

4. The object type determines which implementation is executed for overridden methods.

이게 문제인데요

여기서말하는 레퍼런스 타입과 오브젝트 타입의 차이점이 이해가 되질안네요;;   

일단 정답은 4 입니다 <-==- 드래그