Which cloud computing benefit allows you to scale resources up and down according to application load?

Stop guessing capacity" directly addresses the ability to scale resources dynamically. With cloud computing, you don't need to over-provision for peak loads or under-provision and risk performance issues. Instead, you can automatically scale resources up during high demand and scale them down during low demand, paying only for what you use. This eliminates the need to "guess" your capacity requirements. "Go global in minutes" refers to deploying applications in multiple geographic regions quickly, which is a benefit but not directly about scaling resources based on load. "Benefit from massive economies of scale" describes cost savings due to the cloud provider's large infrastructure, not the elasticity of resources. "Trade fixed expense for variable expense" highlights the shift from capital expenditure to operational expenditure, a financial benefit, but not the mechanism of scaling itself.