Which of the Following Best Describes the Condition of Steady-State

Multiple Choice

Which of the following best describes the condition of steady-state equilibrium?

A) System inputs always exactly balance outputs so the system never changes.
B) System inputs and outputs fluctuate around a stable average so the system does not move far from its average condition.
C) System inputs produce large, random fluctuations in output, forcing the system into a new state of equilibrium.
D) Systems slowly adjust to long-term changes in input and output.