A User's Workstation No Longer Boots

Multiple Choice

A user's workstation no longer boots. A technician arrives and confirms the workstation will not boot, and while troubleshooting notices a burning smell coming from the chassis of the workstation. The technician replaces the power cable and tries to boot again, but the smell returns and the machine does not boot. Which of the following components MOST likely needs to be replaced?

A) UPS
B) RAM
C) Heat sink
D) Hard drive
E) PSU