What critical update should be enabled to maintain sharing inheritance for users with access to more than 3,000 opportunities?

Enabling increased coverage of Einstein Analytics sharing inheritance for opportunities is essential when managing user access to a substantial number of records, in this case, more than 3,000 opportunities. Sharing inheritance allows the appropriate sharing settings from parent records to be inherited by child records, which can ensure that users retain necessary access throughout their data hierarchy.

When users have access to a significant quantity of opportunities, maintaining sharing inheritance becomes critical to ensure that users can view or interact with all relevant data points efficiently. By increasing the coverage of sharing inheritance, you ensure that users do not inadvertently lose access to essential opportunities, fostering a more seamless user experience and encouraging data collaboration.

Other options, while potentially relevant in different scenarios, do not adequately address the need for maintaining sharing settings in the face of a large volume of opportunities. For example, limiting access based on permissions might restrict necessary access for users who genuinely need it, while disabling sharing inheritance for large records could lead to significant gaps in visibility. Finally, expanding default data visibility could affect all users indiscriminately and does not specifically target the issue of sharing inheritance for opportunities. Thus, option A provides the targeted solution necessary for successful data management in this context.