以下何者可說明「提高預算」的地理區域實驗策略？

A "budget increase" geographical experiment aims to measure the impact of increased spending. Therefore, the experimental group, which represents the areas where the change is applied, will have its budget increased. The control group, which serves as a baseline for comparison, must maintain its original budget to isolate the effect of the budget increase. Decreasing the experimental group's budget would test a budget reduction, not an increase. Changing the control group's budget would invalidate its role as a stable comparison point for the experiment's objective.