Which option is inconsistent with the set point theory that body weight is actively regulated within a narrow range? 

Hormonal signals such as leptin and ghrelin adjust appetite and energy expenditure to oppose deviations from a defended weight. 

Short-term mass changes from hydration or glycogen shifts do not indicate a true change in the defended weight and are corrected by homeostatic mechanisms.

Extended environmental or behavioral changes can gradually recalibrate the defended weight so the body adopts a new long-term target after sustained exposure.

Attempts to maintain a lower or higher weight typically trigger compensatory changes in metabolism and hunger that resist sustained large deviations.