Corona and App Inventor can be used to develop ________

The administrator modifies a rule on the firewall, and now all the FTP users cannot access the server any longer. The manager calls the administrator and asks what caused the extreme downtime for the server. In regards to the manager's inquiry, which of the following did the administrator forget to do FIRST?

A. Submit a change request B. Schedule a maintenance window C. Provide notification of change to users D. Document the changes

_________________________ are tools designed to help support specialists keep track of important installation steps and provide documentation for technology.

Fill in the blank(s) with the appropriate word(s).