It should say “Nick not only dealt with the typical challenges of school and adolescence, but he also struggled with depression and loneliness”
He probably gives the info from the heart.
I believe your answer would be c, as marks of punctuation go before quote lines(sorry I can't remember the names of ") Hope this helps!
Answer: c. It creates a matter-of-fact tone as Machiavelli demonstrates the positive effects of a ruler's cruelty.
Explanation: