Final answer:
Holden in 'The Catcher in the Rye' has only been somewhat successful in navigating the adult world, facing many struggles and often misunderstanding the responsibilities and social norms expected of him.
Step-by-step explanation:
In The Catcher in the Rye, Holden's efforts to navigate adulthood after leaving Pencey Prep can be described as somewhat unsuccessful. Holden experiences various failures as he attempts to fit into the adult world, indicating that his journey is fraught with setbacks and miscommunications. His struggles with maturity, responsibility, and social interaction all point to the challenges he faces in his transition into adulthood.