Why can’t my computer recognize a new RAM module?

You’ve upgraded the memory in a computer by adding an additional memory module to the motherboard. After powering the system up, the BIOS doesn’t show any errors but it also doesn’t show any additional memory in its memory counts. What is the best next step to troubleshoot the problem?

A) Run a full memory test from the system diagnostics disk

B) Reseat the memory module

C) Contact the memory module manufacturer’s technical support

D) Remove the memory module from the computer and try it in another system