I read she worked for the NAACP at the time of the arrest. She certainly was an influential person.
Yes, and this played a part in why Rosa Parks is "The Famous Rosa Parks".
Rosa wasn't the only one to protest the asinine policy of forcing blacks to sit in the back of the bus. BUT, she was a known quantity to the NAACP, was considered reliable, and had a squeaky clean background. These were the qualities the NAACP needed in someone who would have to go through an ugly legal, political, and PR gauntlet.
So Rosa's case was picked over others to go through the court system. And to her benefit, she showed class both throughout the affair and after everything was said and done.
This was from a different era - back when the NAACP wasn't a bunch of race-baiting numskulls....