Which Definition Best Describes the Allopathic System or Philosophy of Health

Which definition best describes the allopathic system or philosophy of health care?

A) A system that holds that disease is a result of nerve dysfunction
B) A system that uses tiny doses of a substance which create the symptoms of disease in a healthy person to relieve those symptoms in a sick person
C) A method of treating disease with remedies that produce effects different from those caused by the disease
D) A system that maintains that illness is the result of falling out of balance with nature