Answer:
For careers, find something you enjoy doing, for jobs, kind of the same thing, just find it worthful. If you meant advice about careers and jobs then here you go, I mean it's never to late to choose one, so if you're asking yourself what career or job you should get then take your time choosing.
The flagman tells the man it is not his job to issue the tickets.
Whilst all the answers given here are correct in some way, the correct one is still A, preventing a war in Vietnam. The 60s were a hippy era, the pacifist movement against wars. And since the war in Vietnam lasted for 20 years, it is obvious that that is the thing which colored their lives black and something they stood against the most.
If feel that it were to be other youtube's and like his mom because he mostly talks about his mom in his videos, and i also think he just wanted to follow his dreams and listen to his heart, which later became a great influence because he just came out with a book, and has a tour, and is very popular on youtube now.