What can we learn about “Hobbit” that Tolkien created in his works?

A、HobbitwasaracelivinginEnglishdowntownareas.
B、Hobbitwasalocalpeoplewhowereverytallandstrong.
C、Hobbitwasasocialgroupofpeoplewholivedinoldcastles.
D、Hobbitwasagroupofpeoplewhoweremostlydwarves.