Homer Plessy attempted to challenge Louisiana's racial segregation policies by

A) refusing to move from a "whites-only" Louisiana train car.
B) sitting in at a "whites-only" restaurant.
C) refusing to sit at the back of a New Orleans streetcar.
D) sitting on the ground floor of a public theater, instead of in the balcony.
E) sending his daughter for treatment to a superior "whites-only" hospital.

A