Answer:
A. Use a SATA to 6 pin PCI-e adapter.
Explanation:
SATA cables or connectors, also known as serial ATA, are usually meant for installing optical drives and hard drives. Unlike its counterpart (PATA), it is much faster in speed and can hot swap devices, that is, devices can be installed with shutting down the system.
PCIe are extension adapter cables in PC, used for the purpose of connecting peripheral devices like video cards, networt card etc.
A SATA to PCIe adapter cable can be used to power the video card to be installed. It is cheaper and faster than other options.