Which possible consequence of global warming represents a negative feedback loop? 

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

Negative Feedback Loop

A process in a system where the output may feed back into the system to counterbalance changes and maintain stability within the system.

Permafrost

A dense layer of soil under the surface that stays frozen all year long, primarily found in regions near the poles.

Tundra Soils

Soil found in tundra biomes, characterized by permafrost, low temperatures, and minimal nutrient content, affecting vegetation and overall ecosystem productivity.