Global Change in the earth system Part 3

A variety of natural processes can affect Earth's atmospheric temperature in a relatively short period of time. Which of the following would contribute to an overall cooling of Earth's atmospheric temperature?

Choose one or more:
A. increasing the abundance of methane in the atmosphere
B. increasing the albedo of the Earth's surface
C. increasing the abundance of carbon dioxide in the atmosphere
D. increasing the abundance of volcanic aerosols
E. increasing the abundance of sunspots