Correct Answer: A
Explanation
Running docker engine activate will upgrade Docker Engine CE to Docker Engine EE. This is a feature that allows you to switch from the Community Edition to the Enterprise Edition without reinstalling Docker or losing any data. You need to have a valid license file and a subscription to Docker EE to use this feature1. Docker EE is a premium version of Docker CE that offers additional features, such as security scanning, image management, and certified plugins23. References:
* Upgrade Docker Engine | Docker Docs
* What is the exact difference between Docker EE (Enterprise Edition), Docker CE (Community Edition) and Docker (Custom Support) - Stack Overflow
* Docker Community Edition or Docker Enterprise Edition - Docker | BoxBoat