单项选择题
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.
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