Which of the Following Is True About Extinction

Multiple Choice

Which of the following is true about extinction?

A) Overexploitation by hunting and fishing is the foremost threat to tropical animals and plants.
B) Without human activity, all species would survive and there would be no extinctions.
C) There are many causes of extinctions and an animal or plant may go extinct for any of a combination of these factors.
D) Commercial hunting and fishing are careful not to deplete animal reserves.
E) Introduction of new alien species helps preserve biodiversity and slow extinction.