Shelton: The recent sharp decline in the number of moose in this region was caused by a large increase in the white-tailed deer population. While the deer do not compete with moose for food, they carry a dangerous parasite that can be transferred to any moose living nearby. Russo: The neighboring region has also experienced a large increase in the white-tailed deer population, but the moose population there has remained stable. Which one of the following, if true, most helps to resolve the apparent conflict between Shelton's and Russo's statements? ['There is a large overlap in the ranges of moose and white-tailed deer in the region with the declining moose population, but not in the neighboring region.', 'Moose require a habitat with very little human settlement, whereas white-tailed deer often thrive in and around areas with considerable human settlement.', 'The region with the declining moose population is larger than the neighboring region and, even after the decline, has more moose than the neighboring region.', 'The region with the declining moose population consists mainly of high-quality moose habitat, but the quality of moose habitat in the neighboring region is marginal.']