In the Description of Homeostasis, the Term "Dynamic Constancy" Refers

In the description of homeostasis, the term "dynamic constancy" refers to:

A) the fact that even though physical and chemical changes do occur, conditions are kept within a range.
B) a constant movement toward equilibrium.
C) the direct interaction of each positive feedback system with its corresponding negative feedback system.
D) the use of ATP to initiate a cascade effect.
E) a disregarded theory that suggested there were no external energy requirements to maintain cell homeostasis.