The app builder should add the field to the custom report type field layout to troubleshoot this issue. A custom report type is a type of report that defines which objects and fields are available for reporting. The app builder can customize which fields are included in each custom report type by editing its field layout. If a new field is added to an object that is part of an unmanaged package, it will not be automatically added to the custom report type field layout. The app builder needs to manually add it to make it available as an option to add as a column in reports based on that custom report type. Option A, B, and D are not steps that can troubleshoot this issue.

The automation solution that would meet these requirements is Process Builder. Process Builder is a tool that can create and update records, send email alerts, submit records for approval, invoke flows, call Apex classes, and post to Chatter based on certain criteria and actions. The app builder can use Process Builder to create a process that starts when an opportunity is marked as closed won, creates a new opportunity record for the renewal with pre-populated fields, and sends an email alert to the contracts team. Option A is incorrect because an approval process is not suitable for this requirement, as approval processes are used to define the steps and criteria for approving records. Option B is incorrect because a validation rule is not suitable for this requirement, as validation rules are used to enforce data quality and prevent users from saving invalid records. Option D is incorrect because a workflow rule is not suitable for this requirement, as workflow rules are considered legacy tools and have limitations compared to Process Builder.

Create a master-detail relationship between the parent and child object with a roll-up summary field that filters on the status field is the recommended method for the app builder to achieve the request of rolling up sales metrics to an opportunity for only Detailed.Sales__c records that have their picklist status set to Active. According to the Salesforce documentation, "Roll-up summary fields calculate values from related records, such as those in a master-detail relationship." A roll-up summary field can filter on a field value of the child records and sum up only those records that match the criteria. Utilize the AppExchange to download a third-party application that can roll up the sales dollars with the appropriate filter, create a lookup relationship between the parent and child object with a roll-up summary field that filters on the status field, and utilize Apex code to roll up the desired amounts are not valid or necessary methods for this request.

The category that handles bug fixes and simple changes is minor. A minor release is a type of release that introduces small enhancements or fixes to existing functionality, such as correcting spelling errors or improving performance. A minor release usually has a low impact on users and does not require extensive testing or training. A patch release is a type of release that addresses critical issues or defects that affect the functionality or security of an application, such as fixing broken links or resolving vulnerabilities. A patch release usually has a high impact on users and requires immediate deployment. A major release is a type of release that introduces new functionality or features to an application, such as adding new objects or components or changing business processes. A major release usually has a high impact on users and requires extensive testing and training. A rollback is not a type of release, but an action that reverses a release that has been deployed to an environment, such as undoing changes or restoring previous versions. A rollback may be necessary if a release causes errors or issues that affect the functionality or performance of an application.

The app builder should use Sum as the type of summary in the roll-up summary field. A Sum type of summary allows the app builder to calculate the total value of a numeric field from the child records related to a parent record by a master-detail relationship. The app builder can create a roll-up summary field on the Account object that sums the Amount field from the won Opportunities related to each Account. Count is not a valid type of summary, as it does not calculate the total value of a numeric field. A Count type of summary allows the app builder to count the number of child records related to a parent record by a master-detail relationship. Max is not a valid type of summary, as it does not calculate the total value of a numeric field. A Max type of summary allows the app builder to display the largest value of a numeric or date field from the child records related to a parent record by a master-detail relationship. Min is not a valid type of summary, as it does not calculate the total value of a numeric field. A Min type of summary allows the app builder to display the smallest value of a numeric or date field from the child records related to a parent record by a master-detail relationship.