Which of the following statements is true?

most native american families in the late 1800s were living on their own land under the dawes severalty act.

most native americans in the late 1800s died from disease.

most native americans in the late 1800s were either dead or living on reservations.

none of the above

The correct answer should be
Most Native Americans in the late 1800s were either dead or living on reservations.

Most of them had to live on federal land that was granted to them in the form of reservations. Dawes Act came later, near the end of the 1800s, while the high number of deaths was before settling reservations and getting accustomed to white people.