Which of These Statements Describes Negative Feedback

Multiple Choice

Which of these statements describes negative feedback

A) A change in a regulated variable triggers a response by the effector that opposes the change.
B) The input to a system increases the output, and the output limits its own production by inhibiting the input.
C) A control system's input and output continue to enhance each other in order to maintain homeostasis.
D) It is the main operating principle of most of the body's homeostatic control mechanisms.