A server needs to have memory added to support a new application. It currently is using PC4200
in a single channel configuration. Which of the following would be the correct memory upgrade?

A.
Install larger capacity PC2100 dual channel memory modules.

B.
Add a PCI expansion card with PC2100 single channel memory modules.

C.
Install smaller capacity PC4200 single channel memory modules.

D.
Install larger capacity PC4200 single channel memory modules.