下面哪一项描述的是“提高投放力度”地理区域实验策略？

提高投放力度" (Increase Delivery Intensity) in a geographical experiment strategy means you are testing the impact of increased investment in a specific region. To do this effectively, you increase the budget for the experimental group (the region where you want to boost intensity) while keeping the budget for the control group (a comparable region) unchanged. This allows you to isolate and measure the effect of the increased budget on performance metrics in the experimental region. The other options describe scenarios like decreasing budget, which would be for testing reduced intensity, or manipulating both groups' budgets in ways that wouldn't clearly isolate the impact of increased intensity in one specific area.