What are the two web layer sharing options in ArcGIS Enterprise?

In ArcGIS Enterprise, when sharing web layers, the two primary options available are to either reference registered data or copy all data. Referencing registered data allows users to access data stored in a location that has been registered with ArcGIS Enterprise, leveraging existing resources without duplicating them. This method is efficient, as it maintains a single version of the data that all users can access, ensuring consistency and minimizing storage use.

On the other hand, copying all data means that a duplicate of the data is made and stored within the web layer. This approach is useful when you want to ensure that the shared layer is independent of the original dataset or when the data needs to be self-contained, but it can lead to larger storage requirements and potential issues with data redundancy.

Thus, both methods provide flexibility in how data is managed and shared within an ArcGIS Enterprise environment, making option A the correct choice. The other choices focus on only one of these options or introduce alternatives that do not align with standard sharing practices within ArcGIS Enterprise.