Which event led to the others? * A. The Mendez family sued their school district. B. Sylvia started attending 17th Street Elementary. C. Sylvia was forced to attend an inferior school. D. Four districts in California ended segregation.

The event that led to the others:

C. Sylvia was forced to attend an inferior school.

A. The Mendez family sued their school district.

D. Four districts in California ended segregation.

B. Sylvia started attending 17th Street Elementary.

Explanation:

The above events formed the beginning of the landmark judgement that ended the segregation of American schools, starting from 1945.  Five Mexican Americans: Sylvia, Gonzalo Jr., and Geronimo Méndez had dark skin, hair, and eyes, while their nieces: Alice and Virginia Vidaurri had white skin, hair, and eyes.  As a result, Sylvia and siblings were not admitted into the 17th Street Elementary while Alice and Virginia were admitted.  As a result, the Mendez family sued the Westminster School District.  In 1946, the federal court ruled that establishing separate but equal schools for Mexican American children in Orange County, California was unconstitutional.

an era of negotiation.

is that an answer to your question?

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.