A. Ask the owner of the custom entity records to grant specific users read and write access to the records.

B. Modify an existing security role that is common to the users. Grant the role access to the custom entity.

C. Add the users to access teams. Grant the teams read and write access for each of the custom entity records.

D. Create an owner team that includes the users. Assign the team a new security role which can access only the custom entity.