When a user has no access to one of the Master detail entity of a junction object, they will not have access to the junction object. To have read access to the junction object, it is a must to have at least read access to both the parent entities. Correct answer is A

C. The user will see the junction object but not the link to the Production Facility.

Here’s why: Access to a record in Salesforce, including junction object records, depends on the user’s permissions and the sharing settings of the related master-detail objects. If the user’s profile grants them Create/Read access to the "Job" object but no access to the "Production Facility" object, they can still see the "Job Production Facility" junction object records (assuming they have the permission to see the junction object itself). However, their ability to see related "Production Facility" details directly through the junction object would be restricted due to the lack of access to the "Production Facility" object. Salesforce enforces object-level security (OLS) and field-level security (FLS) to ensure that users cannot access objects or fields they do not have permissions for, even if they can access related records.