What does the following passage mainly reveal about Chris McCandless (paragraph 13)?
At long last he was unencumbered, emancipated from the stifing world of his parents and peers, a world of abstraction and security and material
excess, a world in which he felt grievously cut off from the raw throb of existence,
D A His parents paid his college tuition
B. He was happy where he was and had no good reason to leave
C. He hoped to find a good job and make a lot of money
D. He felt trapped and unfulfilled before deciding to leave