Lin is booting up his computer. Sometimes during the boot process, the computer will shut down, but more often than not it will reboot on its own or simply freeze. He thinks the problem could be due to an intermittent undervoltage problem with the power supply, so he uses a power supply tester. The test shows that the power supply is functioning properly.

What should Lin check next in the troubleshooting process?

a$.$

Processor

b$.$

Hard drive

c$.$

Motherboard

d$.$

RAM