Which of the Following Is Not a Characteristic of Reciprocal

Which of the following is not a characteristic of reciprocal wills?

A) They are separate wills where the testators leave property to each other.
B) The leaving of property to each other is conditioned on the beneficiary disposing further of the property only in accordance with the terms of the reciprocal wills.
C) They can be executed only by husband and wife.
D) They cannot be revoked after one of the parties dies.