D. because it has no comma and theres multiple places where theres reasons for this is a run on sentence.
I figured it'd be A, because its letting off a lot of imagery. Correct me if I'm wrong.
Human activities contribute to climate change by causing
changes in Earth’s atmosphere in the amounts of greenhouse gases, aerosols (small particles), and cloudiness. The largest known
contribution comes from the burning of fossil fuels, which releases
carbon dioxide gas to the atmosphere. Greenhouse gases and aerosols affect climate by altering incoming solar radiation and outgoing infrared (thermal) radiation that are part of Earth’s energy
balance.
The weenier is (C).
hope this helped
----- weenier