Four years ago Faleka bought a custom computer with a mid$-$tier motherboard and a basic configuration option. During the last three months he has noticed the video quality seems to be gradually degrading. To troubleshoot, he uses a known$-$good replacement monitor and video cable, but the problem persists. What would be a reasonable course of action for Faleka to take? a$.$ Remove the existing onboard video card and install a new one. b$.$ Four years is a long time, so the video drivers need to be updated. c$.$ Disable the onboard video port and install a new graphics card. d$.$ A wireless router is too close to the monitor causing interference.