It is data that has been collected for a particular reason but then that data is used for something else
C
you don't need to know how I know.
Inferior. 'Sub' as a prefix means 'under' or 'below', and indicates that the subject is in a relatively small proportion.
If you're asking for main idea, the main idea or thesis statement sentence is sentence 1, where they explain what the passage is about.
Answer: lack of sleep
Explanation: we could go to sleep at a more decent time or turn our phones at night
