Patrick wants you to repair his laptop LCD screen. Patrick insists that it was not his fault, but sometime during the night, the laptop fell off his desk, and now the screen is broken. During disassembly of his laptop, you see a mini$-$PCIe card with a black cable and a white cable wire connected that appear to go into the screen bezel.

What is the function of the two wires?

a$.$ Sound cord for the sound port

b$.$ Wi$-$Fi antenna

c$.$ Webcam connector

d$.$ Video cable