Your nephew has been asked to work on a database for NBA teams. The following are the requirements he has been given:

All teams play in the Eastern Conference or the Western Conference.

Teams in each conference are named for cities or states.

Some teams have moved from one conference to another.

He asks for help in defining entities and attributes. Which of the following answers would you suggest he use? Select all that apply.

NBA as supertype with Conference as subtype

Conference as subtype under Team as supertype

Team as subtype under Conference as supertype

City and State as subtypes under Team as supertype

TeamMoved as attribute of Conference subtype

CityName as attribute of Team supertype