The Hot Spot Problem Is

The hot spot problem is:

A) the U.S. obtains the majority of its oil supplies from politically unfriendly countries.
B) some air pollutants such as sulfur dioxide have a greater effect nearby than further away.
C) some air pollutants such as carbon dioxide have an equal effect nearby and further away.
D) nuclear plants heat up nearby water, causing a decline in the native fish population.