Answer:
It meant that she didn't have that many jobs to choose from since she was a black woman at the time meaning the only thing she could pursue is teaching since you needed to know stuff for it but luckily she got a job at NASA.
Explanation:
First Question: http://www.sparknotes.com/lit/uncletom/themes.html
Second Question: http://www.sparknotes.com/lit/uncletom/themes.html
Is this a joke
well if it is i have 2 anwers
cows or new deli