A user you support has worked for hours on a spreadsheet document. A sudden power outage in the building causes their computer to power down. When the power comes back, they cannot find the spreadsheet they've been working on$.$ Why is this?

Each correct answer represents a complete solution. Choose two.

A There must have been a glitch in the computer's memory when the power went down. Thus, the user cannot restore it$.$

B The user was working on the document in RAM memory. When the computer went down, everything in RAM was erased.

C When the power went down and came back up$,$ there was a power glitch in the computer's ROM.

D The user neglected to save the document to the computer's hard drive.