Ernst, Frieda, and Gertrude bought Blackacre, a three-bedroom house, and took title as tenants in common. They bought Blackacre as an investment and planned to rent it out. However, Frieda and Gertrude loved the house and decided to move in. Ernst wants Frieda and Gertrude to pay him rent for living in a house that is one-third his, after all. Frieda and Gertrude flat out refuse to do so and tell him he's free to move in with them if he wants to. Which of the following is true?
A. Frieda and Gertrude owe Ernst two-thirds of the rental value of the house.
B. Frieda and Gertrude owe Ernst one-third of the rental value of the house.
C. Frieda and Gertrude do not owe Ernst rent, but the value may be taken into
account in determining liability for carrying charges such as insurance in an accounting action.
D. If the three were joint tenants instead of tenants in common, Frieda and Gertrude
would have to pay Ernst rent.