The data in figure 2 most directly support which of the following claims made by the authors? a The addition of both cattle and wildlife to a plot reduces its pouched mouse population density by approximately one-half. b The drought of 2000 reduced pouched mouse populations on plots both with and without large mammals to the same level. c Differences in pouched mouse population densities between plots with and without large mammals increased over time. d The variations in pouched mouse populations on plots with and without grazers can be attributed to the way different habitats impact reproductive capability.