A company running on-premises servers is starting a new business line and needs extra servers quickly. Which cloud computing advantage helps provision additional infrastructure rapidly?

The correct answer is "Increase speed and agility." Cloud computing allows businesses to provision new infrastructure, like servers, in minutes rather than weeks or months, which is typical for on-premises setups. This rapid provisioning directly addresses the need for extra servers quickly for a new business line. "Benefit from massive economies of scale" is a cloud advantage related to cost savings due to shared infrastructure, not speed of deployment. "Trade fixed expense for variable expense" refers to the financial model of paying only for what you use, rather than large upfront capital expenditures. "Go global in minutes" highlights the ability to deploy applications in multiple geographic regions quickly, which is a specific aspect of agility but not the primary advantage for simply needing extra servers rapidly in general.