Which statement describes what the impact of methane might be as global warming progresses? 

A)  Methane might be absorbed from natural wetlands with rising carbon dioxide. 
B)  Methane may be reduced by bacteria in tundra soils. 
C)  Methane may be released from oceanic mud as ocean waters warm. 
D)  Methane might be absorbed as permafrost melts in the arctic tundra.

Oceanic Mud

Fine-grained sediments found on the ocean floor, composed of particles of rock, minerals, and organic matter.

Tundra Soils

Soil found in the tundra biome, characterized by freezing temperatures and limited decomposition, resulting in thin soil layers with minimal nutrients.

Arctic Tundra

a cold, vast, treeless area in the Arctic region characterized by permafrost, low temperatures, and minimal vegetation.