A technician is trying to install a full-size PCI card into a slim line desktop PC. Which of the following would MOST likely be required to facilitate installation?

A RAID card is a type of expansion card used for storage controller functionality; it does not solve the physical form factor clearance problem.

CNR (Communications and Networking Riser) is a proprietary legacy slot standard for modem/NIC cards, not a general adapter for full-size PCI cards.

Slim line and small form factor cases do not have enough vertical clearance for a full-height expansion card standing perpendicular to the motherboard - a riser card connects to the motherboard's PCI slot and provides a secondary slot oriented horizontally so the card lies parallel to the motherboard within the case.

MCA (Micro Channel Architecture) is an obsolete IBM proprietary bus standard from the late 1980s and is unrelated to modern slim line PC installation.