The primary purpose of the passage is to A. explain the role played by temperature in the stimulation of DMS production by marine algae B. outline the sequence of events that occurs during the process of cloud formation caused by algal activity C. describe a dispute about the role played by marine algae in certain instances of cloud formation D. propose a way in which scientists might be able to understand the effects of clouds on marine algae E. discuss a theory regarding the function of DMS production by marine algae