Explanation
The correct answer is A because using Django queries, using curl to create a container and add artifacts to it, and removing temporary lists are examples of things commonly done with the Phantom REST APP. The Phantom REST APP is a built-in app that allows you to interact with the Phantom server using REST API calls. You can use the run query action to execute Django queries on the Phantom database and return the results as JSON. You can use the curl command to send HTTP requests to the Phantom server and perform various operations, such as creating containers, adding artifacts, running playbooks, etc. You can use the remove list action to delete temporary lists that are no longer needed. See Splunk SOAR Documentation for more details.

Explanation
A user can determine which app actions are available by adding an action block to a playbook canvas area.
The action block will show a list of all the apps installed on the Phantom system and the actions supported by each app. The other options do not provide a comprehensive view of the app actions available. Reference, page 11.

Explanation
The main purpose of using a customized workbook is to guide user activity and coordination during event analysis and case operations. Workbooks can be customized to include different phases, tasks, and instructions for the users. The other options are not valid purposes of using a customized workbook. See Workbooks for more information.