What is one reason full sandboxes are restricted to a monthly refresh?

The correct answer is centered around the essential function of full sandboxes in maintaining alignment with production environments. Full sandboxes are designed to replicate the entire production organization, including all data and metadata. By restricting the refresh to a monthly schedule, it ensures that changes made in production can be effectively synchronized, allowing teams to test new features or changes in an environment that closely mirrors the live settings.

This limitation on refreshing the sandbox monthly provides a stable platform for development and testing while reducing the risks associated with frequent data pushing. It also minimizes disruption since teams can focus on testing and developing features without the constant changes that come from more frequent refreshes. The alignment between the production and sandbox environments is crucial for accurate testing scenarios, ensuring that any changes are valid and applicable when synchronized back to production.