Answer:
Normal CPU usage is 2-4% at idle, 10% to 30% when playing less demanding games, up to 70% for more demanding ones, and up to 100% for rendering work. When watching a video it should be around 5% up to 15% (total), depending on your CPU, browser and video quality
C) Making a duplicate copy of the data and storing it in another location.
Notes in your last meeting.
Why did you give the answer though? Besides, wouldn't this go in History or Social Studies since you study sources in them?