Answer:
yeah but I gotta re-download it
Primary sources would be best
Answer: D) Operating Systems manage the computer's random access memory (RAM)
Explanation:
It's not A because all modern computers use some form of an Operating System.
It's not B because some Operating Systems can cost hundreds of dollars.
While C has some truth to it, it's reversed. Operating Systems are there to manage and allocate system resources, and D is the better choice.
Either your screen isnt plugged in and synced properly or you have a problem in the automatic boot system
A writer maybe, because you can work by yourself, even at home.