it is completely up to the person who is going to pursue one of those careers to answer that question. But in my opinion being an astronaut seems to be the most rewarding out of the three choices
i would say that that is up to you....if you would want to pursue one of those things..you should do some research on it and see which interest you more as well as which one would provide you with...
Your question does not make any sense. Possibly re-word it so it states: "Which is a better career in IT" and then list possible IT related career choices.
Depends on what measurement of 'better' you use. Do you mean income? In which case probably a lawyer. Do you mean job satisfaction? Then probably a nurse.