Option C: Developer Sandbox
Correct Answer.
Developer Sandboxes are intended for coding and testing by a single developer.
They copy all application and configuration information from production, ensuring the same metadata.
Each developer can work in their own isolated environment.
Full Sandboxes include all data and are often limited in number.
They are better suited for performance testing and staging.
Option B: Developer Edition
Incorrect.
Developer Edition orgs do not mirror production configurations.
They are standalone orgs with limited features.
Option A: Partner Developer Edition
Incorrect.
Intended for ISV partners to develop and package applications.
Conclusion:
The best-suited org type is Developer Sandbox, which is Option C.
Reference:
Sandbox Types and Templates
Option D: Full Sandbox
Not Ideal for Individual Developers.