Under the Common Law of Environmental Nuisance

Under the Common Law of environmental nuisance

A) a defendant may successfully claim that the nuisance is a benefit to the public,thereby eliminating liability.
B) a defendant may use the defence that it used all necessary care and skill to prevent the nuisance from occurring.
C) a defendant may successfully use the defence that it existed with its offending activity before the plaintiff came to the nuisance.
D) a defendant may not argue that its actions do not constitute nuisance because other entities independent of it are also engaged in the same activity.
E) All of these.