A user is having difficulty getting a laptop to display through a projector. During the troubleshooting process, it was verified that the built-in display is working properly.

What do you think would be the next step to diagnose and resolve the projector display issue?

a. Replace the integrated graphics adapter in the laptop computer.

b. Increase the shared video memory allocated to the laptop's integrated video adapter.

c. Reseat the backlight power connection in the laptop computer's display.

d. Use the laptop's function key to toggle display output to external video.