Which of these is an example of thermal pollution

Sewage is an example of water pollution.

Since no options were given, mine were:

A) sediment particles floating in water clog the gills of fish

B) fish die from lack of oxygen due to an algal bloom

C) algae are killed by solvents that have run off into a pond

D) rainbow trout disappear from a stream because of high water temperatures

The answer is D