Warming Temperatures Have Accelerated the Thawing of Gelisols

Multiple Choice

Warming temperatures have accelerated the thawing of Gelisols. This is of particular concern because

A) Gelisols contain about half of the pool of global carbon and this release of carbon dioxide and methane into the atmosphere could further affect warming climate.
B) as the permafrost metals, the meltwater will runoff, further contributing to global sea-level rise.
C) Gelisols are an important soils for growing specialty cold weather crops. The thawing of the Gelisols will adversely impact this lucrative market.
D) Gelisols are the youngest, least developed soils on the planet. Warming will further stifle the horizontal development of these soils.