Helen Hunt Jackson's Novel, Ramona, Was Centered Around

Helen Hunt Jackson's novel, Ramona, was centered around

A) the cruel mistreatment of Indians in California.
B) the cheating of Indians by federal agents on the reservations.
C) the efforts of Christian reformers to prevent the killing of Indians.
D) an Indian girl's attempt to retain her culture in an Indian boarding school.
E) the last Indian wars between the U.S. army and the Apaches in the Southwest.