In Pollution Cases Involving Strict Liability for Abnormally Dangerous Activities

In pollution cases involving strict liability for abnormally dangerous activities, courts have NOT found which of the following activities to be abnormally dangerous:

A) crop dusting
B) leakage of chemicals into ground water
C) storing of flammable liquids in quantity in a populated area
D) emitting of steam gases by factories
E) all of the other specific choices have been found to be abnormally dangerous by the courts