All of these but the nosebleeds seem correct, but something much stronger like cocaine can cause nosebleeds.
But if you want just ONE answer 'impaired memory and learning' seems like the best one to pick because that is one of the most noticeable signs of marijuana use.
This website talks about the symptoms of use, I trust its accuracy:
https://www.webmd.com/mental-health/addiction/marijuana-use-and-its-effects#1
THE RA ER ICU IM JUST QUOTING GREAYS ANATOMY IDK
i believe you do compressions.
I believe the answer is b
Easier to read. Knowledge of how a patient is progressing or not. Record keeping of patients for later issues.