It's A and C.

Changes sets have an advantage that they are easier. Most Salesforce orgs start with change sets, because it's easy. No need to set up or pay for 3rd party tools, or train developers on those tools. It's much easier for a developer to get started on change sets than on other tools.

D is wrong because change sets do not track changes to components. The change set does not show you what was changed. If you are using third party tools like Git and Copado, those tools have source control and features to compare what changed.

Correct answer is A and D. Change sets allow users to track the components that are included in a deployment, as well as any dependencies between those components. This makes it easy to see exactly what has been deployed, and to identify any potential issues or conflicts that may need to be addressed before deploying to production. C an easy way to deploy related components, is not necessarily an advantage of change sets. Change sets allow users to include related components in a deployment, but other deployment tools and methods may be better suited for managing complex dependencies between components.