Given： Which statement is true？（）
- ACompilation fails because the hashCode method is not overridden.
- BA HashSet could contain multiple Person objects with the same name.
- CAll Person objects will have the same hash code because the hashCode method is not overridden.
- DIf a HashSet contains more than one Person object with name="Fred"， then removing another Person，also with name="Fred"， will remove them all.