B. acidity...
hope this helps and HAGD!
Answer: considering you are a college student as well, you can start off with signing up for a student credit card and have it pay monthly subscriptions of something payable such as spotify premium charges or netflix monthly subscritptions, something that you'll be able to pay back in order to build your credit score. I hope this helped
Answer: Coherence analysis
Explanation: Coherence analysis indicates the brain activation pattern and and shows similarity of frequency information between areas in the brain.