To ensure auditing users can access records in the Case_Issue__c junction object, the correct data permissions on related records must be established:
D . Read-Only access on Case and Issue__c. Users need read-only access to both Case and Issue__c objects to view associated Case_Issue__c junction object records properly. This is because access to junction object records in Salesforce is determined by the user's access levels to the parent records in a relationship.
Steps to configure access:
Navigate to Setup → Profiles or Permission Sets.
Select the profile or permission set of the auditing users.
Under Object Settings, adjust the permissions for Case and Issue__c to at least 'Read-Only'.
Ensure that users have visibility to the Case_Issue__c object itself.
This configuration allows users to view the details of cases and issues as they audit the junction object records.

The app builder should add the fields to the page layout on the object to ensure users can access the new object and fields. The page layout determines which fields are visible and editable on the record detail page. Option A, B, and C are not necessary for this purpose.

The validation rule should check if the user role is not Marketing, and if the Retail Opt In field has been changed to Yes. The ISCHANGED function returns true if the field value has been changed, and the ISPICKVAL function returns true if the field value matches a specified picklist value.

The correct validation rule formula to ensure that the Scheduled Ship Date field is properly filled out before setting the Opportunity to Closed Won is:
OR(ISPICKVAL( StageName ,"Closed Won") && ( Scheduled_Ship_Date_cCloseDate)>14,ISBLANK(Scheduled_Ship_Date_c)) This formula checks two conditions: if the StageName is Closed Won and the Scheduled Ship Date is more than 14 days after the Close Date, or if the Scheduled Ship Date is blank. If either condition is true, the validation rule will fire and prevent saving the record. The other formulas are incorrect because they either use incorrect syntax (such as "=" instead of "," or missing parentheses) or incorrect logic (such as checking if the Scheduled Ship Date is less than 14 days after the Close Date)

The app builder should create a new roll-up summary field called First Order Date, using Type MIN on the Opportunity Close Date with a filter where IsWon = TRUE. A roll-up summary field is a type of field that calculates values from related records and displays them on the parent record. In this case, the app builder can create a roll-up summary field on the Account object that calculates the minimum (earliest) value of the Opportunity Close Date field from the related opportunities where IsWon = TRUE. This will show when customers made their first purchase. Option B, C, and D are not correct ways to use a roll-up summary field to meet the requirement.