If Earth Were in a Warming Trend,which of the Processes

Multiple Choice

If Earth were in a warming trend,which of the processes below would most likely act as a negative feedback mechanism?

A) increasing the water vapor content of the air
B) increasing the snow cover around the Earth
C) ​decreasing the amount of low stratified cloud cover around the globe
D) ​increasing the carbon dioxide content of the air
E) ​decreasing the snow cover in middle and high latitudes