Answer:
D: Use a multimeter to test the power supply
Explanation:
We want to determine whether the power supply is causing the reboots. Now, the most ideal thing to do will be to connect a multimeter to help in testing the source of power supply. This is because a multimeter measures the major factors in power which are voltage, current and resistance and as such it is therefore a standard diagnostic tool used widely by technicians in the electrical & electronic industries.