B. Give Super User permission to the partner manager users.

The Super User permission for partner users in Salesforce communities allows those users to access data owned by others within the same account (distributor) they belong to. This includes viewing, editing, and reporting on records such as Cases and Containers. This solution is scalable as it doesn’t require manual sharing rule updates or permission set assignments for each user. Instead, by granting Super User status to partner managers, they automatically gain broader access rights within their distributor’s data, aligned with the requirement, without giving them access to partner executive data. This approach respects the organization's data visibility rules and does not compromise on the security model established within the Salesforce environment.

I agree, correct is B

Correct answer is B