Which of the Following Is Most Likely to Occur as a Consequence

Which of the following is most likely to occur as a consequence of global climate change?

A) The distributions of plants and animals will move closer toward the equator.
B) The distributions of plants and animals in mountains will move downward to lower elevations.
C) The rates of decomposition and microbial activity will increase,thus increasing emissions of carbon dioxide.
D) The distribution of tropical rain forests will increase.