The app builder should know that a field type change is included in the change set and that it can cause a delay in the deployment. A field type change is a change that modifies the data type of an existing field, such as changing a text field to a number field. A field type change can affect many aspects of Salesforce functionality, such as validation rules, formulas, workflows, reports, dashboards, and more. Therefore, deploying a change set that contains a field type change can take longer than usual and require more testing and verification. Option A, C, and D are not changes that can cause a delay in the deployment.