It was a kind of social protest - people did not want to be discriminated because of their race or sex. This event was a precedence - nobody thought that something like this protest could occur at that time. Rosa Parks did something that made people think about tolerance and also made other people join her protest in different places.
What illness are you meaning?
They wanted to stay nurtral to make more money.
C. The correct answer is Emperor Xerxes of Persia