A staff member reports that they cannot access the shared folder on the network； however， other staff members are reporting that they can access the shared folder. Which of the following is the BEST way to identify the problem？（）

• A、The administrator should monitor all traffic between the staff member and the server.
• B、The administrator should reconfigure the RAID configuration to allow more space.
• C、The administrator should map a drive using the net use command.
• D、The administrator should allow the staff member to use a USB drive.