Which statement correctly defines horizontal scaling in CloudHub?

• A. The Mule application can be automatically deployed to multiple CloudHub workers
• B. It involves increasing disk storage
• C. A Mule application can have its worker resized to a larger or smaller vCore size
• D. It requires redeploying to a single CloudHub worker

Answer: (A)

Horizontal scaling means running the same Mule application on multiple workers to handle more requests, i.e., scale out rather than making a single worker bigger. In CloudHub, this is done by deploying the app to multiple workers, so several instances of the app operate in parallel to increase throughput. This matches the idea of growth by adding more execution resources rather than enlarging one resource. The other options describe vertical scaling (increasing disk/storage or resizing the vCore) or keeping the app on a single worker, which does not achieve horizontal growth.