A software company uses the following objects and relationships:

* Case: to handle customer support issues

* Defect__c: a custom object to represent known issues with the company's software

* Case Defect__c a junction object between Case and Defect __c to represent that a defect is a cause of a customer issue

Case and Defect__c have Private organization-wide defaults.

What should be done to share a specific Case_Defect__c record with a user?