A help desk supervisor discovers the following ticket excerpt while reviewing notes in a customer's account:
Received report that customer was unable to use the scanner to read barcodes, the internet no longer worked, and the monitor was fuzzy. Arrived on site and began troubleshooting.
Confirmed monitor issue. Replaced VGA cable.
Confirmed scanner failure. Scanner USB cable was unattached. Reattached cable.
Confirmed internet issue. Duplicated on test laptop. Escalated to ISP.
Which of the following BEST describes what the technician was doing?


A. The technician was questioning the obvious.
B. The technician was implementing preventative measures.
C. The technician was approaching multiple problems individually.
D. The technician was determining if anything had changed.