Why did your computer freeze?

You were working on your computer and everything suddenly froze without any error message. During the reboot of the computer, this message appeared: “Boot device not available.” What is the most likely cause of this message?

A) The hard drive is fragmented

B) The BIOS configuration is incorrect

C) The hard drive is faulty

D) The video driver is corrupted

E) The computer is very, very tired and needs a short nap