A Vehicle Towed into the Shop Will Crank but Won't

A vehicle towed into the shop will crank but won't start. A quick check under the hood reveals that the spark plugs are not firing and the injectors are not receiving a pulse from the PCM. The technician notices that the MIL light does not come on when the key is turned to the run position. What should he do next?

A) Check the PCM's fuses, power wires, and ground wires
B) Replace the PCM
C) Check the main power relay in the power distribution center
D) Check for codes with a scan tool