The sentence that best proves to the reader that Nina is having to adjust to a new place as she is about to begin college is:
C “As her uncle lifted them off the ground, Nina felt the plane detach from the water, but she knew she was leaving behind more than mere earth” (paragraph 7).
This sentence suggests a significant transition and the emotional weight of leaving her familiar environment, indicating her adjustment to a new place as she embarks on her college journey.