"The main character is the same age as the reader or older."
Explanation:
YA books are named that for a reason- one of the most defining traits of those types of books is having a young protagonist. This relates to another answer as well- a young character gives the reader someone to relate to.
The only word that makes sense is 'decision' Jen can't make a work, or a personal, or a juvenile. And she can make a career, it just doesn't fit in the sentence.
