No juice, no pulp

You’ve just installed a new power supply, but you notice that your DVD-ROM drive is not receiving any power. Which of these would be the best next troubleshooting step?

A) Swap the power supply for a brand new model

B) Replace the power supply for one with a higher wattage rating

C) Use a multimeter on the DVD-ROM Molex connector

D) Replace the DVD-ROM drive

E) Maybe you can download everything from now on