The Gain of a Biological Control System Can Be Thought

The gain of a biological control system can be thought of as the

A) amount of amplification of the system or the precision with which the control system maintains homeostasis.
B) ratio of the amount of abnormality to the amount of correction needed to maintain a constant internal environment (i.e., amount abnormality/amount of correction needed) .
C) positive feedback needed to maintain homeostasis.
D) stimulus that triggers the biological control system to bring the internal environment back to normal.