D) The lemurs of Madagascar are nocturnal or diurnal creatures that have large eyes, small bodies, and are known for their unique vocalizations.
This is the BEST summary for the passage because it includes all of the main points the author makes about the lemurs. The passage begins by stating where lemurs live, describes their appearance, identifies them as nocturnal or diurnal, and lastly discusses the noises they make. Option C is incorrect because it doesn't even mention lemurs. While lemurs are a type of primate, there are many other primates that would also be included. Options A and B are too narrow and leave out key information.