To identify whether throttling is occurring, you should use the Monitoring hub (B). This provides a centralized place where you can monitor and manage the health, performance, and reliability of your data estate, and see if the compute resources are being throttled. References = The use of the Monitoring hub for performance management and troubleshooting is detailed in the Azure Synapse Analytics documentation.

User1 must be able to:
Create a new domain .
Create two subdomains .
Assign Workspace1 to subdomain1.
Assign Workspace2 to subdomain2.
Key Role Definitions in Fabric:
Domain admin: Can manage domain settings, add/remove workspaces, manage contributors.
Domain contributor: Can contribute to an existing domain but cannot create a domain .
Workspace admin: Only controls permissions/settings inside a workspace, not domains.
Fabric admin: Tenant-wide admin, broader than required.
Requirement: Follow least privilege .
To create a new domain # Requires Domain admin .
To a ssign workspaces to subdomains # Domain admin rights are sufficient.
Fabric admin is excessive and breaks least privilege.
A). Domain admin

Option A is correct because fabric allows you to create shortcuts within Lakehouses. This functionality is particularly useful as it provides a streamlined way to organize and manage data within a Lakehouse environment. By using these shortcuts, you can efficiently point to other storage locations, thereby enhancing accessibility and reducing the complexity of data retrieval.
Option B is correct because when you create a KQL database, a Shortcuts folder is automatically present. This folder is integral to the organization of the database, allowing users to create shortcuts that facilitate easy access to various data points and resources within the database.
Reference:
https://learn.microsoft.com/en-us/fabric/onelake/onelake-shortcuts