The correct answer to this question is A, PATA. The original name of this cable was AT Attachment. It is also referred to as a PATA connector. The cables are flat. PATA stands for Parallel ATA. They have 40 pin connectors, and those connectors are in a 20x2 matrix.
PATA cables are an IDE or Integrated Drive Electronics standard. Their purpose is to connect drivers, like hard and optical, to the motherboard. One end goes into the motherboard port. This port is usually labeled IDE. The other end goes into the storage device, either the hard drive or optical drive.