Troubleshooting bad scanner quality

A customer is complaining of poor quality after scanning a document on their flat-bed scanner. The scanned image is readable, but there are a handful of small flecks and dots in random places around the page. What is the most likely cause of this issue?

A) The glass on the scanner is dirty.

B) The connection between the computer and the scanner is faulty.

C) The scanner’s device driver is failing.

D) The computer doesn’t have enough memory to scan images.