A program configuration file on a shared computer changes each time the program is run, causing the program to fail. Which of the following steps could a technician take to help prevent this file from being changed?（）

• A、Set the group’s folder permissions to deny.
• B、Use Event Viewer to monitor changes to the file.
• C、Store a backup copy of the file on a USB drive.
• D、Change the file attribute to read only.