Bears Hibernation and Temperature Hypotheses

In a study about the impact of temperatures on the hibernation patterns of bears, Scientist X argues that higher temperatures lead to longer hibernation periods because the bears need to conserve energy. Conversely, Scientist Y believes that warmer temperatures actually reduce hibernation duration, as bears become more active and forage more. Both scientists present valid arguments based on their observations.

Based on these conflicting viewpoints, which hypothesis suggests that bears will sleep less when it is warmer?