Why does Chayo have a grudge against her sister Marta?

Astudent who has completed all college requirement is:

Part a: what are two main ideas of maria w. stewart’s speech? a god is responsible for the discriminatory treatment of african americans. b any individual who decides to commit to a life of domestic servitude is disgraceful. c african americans and women are products of the unfair treatment they receive in the united states. d slavery has crushed african americans’ will to resist and overcome discriminatory practices. e african american women can merely pray for divine intervention for equal rights, as they are not a priority for social reformers. f african americans should work to advance their status by demanding more opportunities for education and meaningful work.

What event shows how eckels' character develops over the course of the story sound of thunder