Which of the Following Is NOT an Example of a Positive

Which of the following is NOT an example of a positive feedback effect from global warming?

A) Increased atmospheric carbon dioxide leads to a rise in ocean temperature; this leads to lower dissolution of carbon dioxide in seawater, which leads to increased atmospheric carbon dioxide.
B) Increased warming of the atmosphere leads to an increase in evaporation; this leads to an increase in water vapor, which leads to a rise in atmospheric temperatures.
C) Increased warming of the atmosphere leads to an increase in the melting of Earth's permafrost; this leads to increased atmospheric methane, which leads to increased warming of the atmosphere.
D) Increased carbon dioxide in the atmosphere leads to a higher acidity of the oceans; this leads to increased fatalities of microscopic photosynthetic creatures that make their skeletons from calcium carbonate, which leads to increased carbon dioxide in the atmosphere.
E) Increased warming of the atmosphere leads to an increase in the melting of the Arctic Ocean ice; this leads to an increased volume of ocean water, which leads to increased melting of the Arctic Ocean ice.