Chinthaka, Karissa, and Dora Are "Joint Tenants" of a Piece

Chinthaka, Karissa, and Dora are "joint tenants" of a piece of land called Blackacre. As explained in the text, that must mean that

A) they each pay an equal amount of rent to their landlord.
B) they are all be related.
C) if Karissa dies first, her interest will be acquired by either Chinthaka or Dora, depending upon which party is named in Karissa's will.
D) they all acquired their interest at the same time.
E) each person has the right to exclude the other two from at least one section of Blackacre.