Actually venting problems with the person may help them understand that you dont like or wont tolerate his or her behavior and can help understand not to do it in the future with other peers. It's never good to be shy and scared please speak up.
Answer:
Its either the first option (on the left)
or the bottom option on the left
(other words its either "A study found that playing certain games gave students more confidence" or "video games have benefits in the classroom besides grabbing students interest"
D because Gatsby is telling him all these wonderful things
Well me going through and reading excerpts from the passage widely leads me to believe that this is an informal passage because they are informing you on the history of The United States