These things happened during the time of the Mexican Revolution. General Victoriano Huerta came after the assasination of Madero and Pino Suarez, but before that, Madero and Suarez were pushed to resign in 1913. The ouster of Huerta failed. The failure of Huerta's ouster resulted to a civil war.
The case is closed
and will no longer be allowed to open unless directed by a judge
The solution was to hire young women. In New England, there were a number of girls who had some education, in that they could read and write. And working in the textile mill seemed like a step up from working on the family farm.
They feared more mistreatment
I think it is the choice C