The shutdown interruptus

Your old Windows XP computer has been suffering from an intermittent shutdown problem for a long time, but it’s now occurring at least once a day. You’ve also recently started using more graphically intensive applications, and the abrupt shutdown often occurs when these applications are active. Which of these would be the most likely cause of this issue?

A) The newest security patches are conflicting with the application

B) The applications are designed for a newer operating system

C) The system is not cooling properly

D) The graphics drivers are old and need to be updated

E) The computer is very tired. Try taking a day off.