The correct answer should be B
https://help.salesforce.com/s/articleView?id=platform.create_test_instance.htm&type=5

Correct answer is B

Answer is B - Developer Sandbox. Charlie's explanation is correct except Developer Sandbox can be created by cloning production metadata and configuration. Developer Edition is something you sign up for but it won't have your production configuration.

In the scenario where a team of many developers works in their own individual orgs that mirror the production org's configuration, the best-suited type of org is:

C. Developer Edition

Here's why:

Developer Edition orgs are designed for individual use and are perfect for developers to build and test features in isolation. Each developer can have their own Developer Edition org, which allows them to work with a configuration similar to production without affecting the actual production environment.
Other options:

A. Partner Developer Edition: This is similar to the standard Developer Edition but is intended for partners who build and distribute applications on the Salesforce platform. It might be suitable for partners but not necessarily for individual developer environments.

B. Developer Sandbox: A Developer Sandbox is a type of sandbox org that mirrors the production org's configuration and data, but it's typically used for development and testing within a team or organization. However, it's not usually intended for individual developers to have their own separate environments.

D. Full Sandbox: A Full Sandbox provides a complete replica of the production org, including all data and configuration. It is typically used for testing and staging before deploying to production. It's more suited for comprehensive testing rather than individual developer environments.

So, for a scenario where each developer needs their own isolated environment with a configuration similar to production, Developer Edition orgs are the best choice....

correct answer: B. Developer Sandbox

Developer Sandboxes are designed specifically for development and testing. Each developer can have their own sandbox environment, which is a copy of the production org’s metadata but not its data. This allows developers to work on their changes independently without affecting each other's work or the production environment.
Developer Sandboxes are ideal for scenarios where multiple developers need separate environments that mimic the production configuration but do not need to replicate the production data.