A Utilitarian Who Recognizes Rights Will Attempt to Explain Rights

A utilitarian who recognizes rights will attempt to explain rights on the basis of utility by claiming that

A) there are no moral rights; there is only utility.
B) a moral right is a kind of claim that is justified by the fact that its recognition will not diminish overall welfare.
C) a moral right is a kind of claim that is justified by the fact that its recognition will contribute to the maximization of overall welfare.
D) all of the above