What Rights Does Harold Have Against Holly

What rights does Harold have against Holly?

A) Only the right to withhold rent.
B) Only the right to bring suit against Holly for damages.
C) Only the right to bring suit against Holly for breach of contract.
D) The right to not pay rent, and the right to bring suit against Holly for damages or breach of contract.
E) He has no rights unless he can prove that he at all times had acted reasonably toward Holly in the air conditioning dispute.