A customer complains that after the memory on his laptop was upgraded from 512 MB to 1024 MB
of RAM, his laptop reports that only 768 MB of RAM is installed. What is the MOST probable
cause of this?

A.
The operating system does not support more than 768 MB of RAM.

B.
The RAM module is not seated properly.

C.
The technician installed the wrong RAM module.

D.
The laptop is equipped with an onboard video adapter that uses shared video memory.