PT94 - S4 - Q10

Is the solution D, because the stimulus does not mention which hospitals the patients are residing in? So even though one particular patient from City X is medevac'd to the hospital in City Y they are still considered a City X patient? Thus that is not a reason that City X has 1/4th of the patients of City Y?

Admin Note: Edited title. For LR questions, please use the format: "PT#.S#.Q# - brief description of the question."