The giving-up density (GUD) of gray squirrels feeding on college
campuses tends to be lower than that of squirrels feeding in suburban back yards. Which of the following hypotheses is consistent with this result?
A) Squirrels perceive predation risk to be higher in suburban back yards.
B) Squirrels perceive predation risk to be higher on college campuses.
C) Squirrels are better fed on college campuses, and thus feed less intensively.
D) Squirrels benefit more by foraging in suburban back yards than on college campuses.