How did chief joseph's leadership affect the nez perce?

The options of the question are:

A. The Nez Perce were able to escape to Canada.  

B. He helped the Nez Perce postpone, but not escape, a forced surrender.

C. He evaded federal troops and led the Nez Perce to Oklahoma.  

D. He negotiated a treaty with the Sioux to share their reservation.

The correct answer is B) Chief Joseph's leadership affected the Nez Pierce by postponing, but not escape, a forced surrender.

Chief Joseph's leadership affect the Nez Perce He helped the Nez Perce postpone, but not escape, a forced surrender.

Chief Joseph(1840-1904), was a Nez Perce Indian warrior from the Oregon Territory. In 1887, he opposed moving his tribe to a reservation as demanded by the United States government. Finally, he reluctantly agreed. But there was this incident where white settlers died and the tribe was blamed. What Chief Joseph did was to lead his people to Canada. But close to the Canada border he surrendered to the Army. After this Nez Perce tribe were sent to prison in Kansas but shortly after they were moved to a reservation.

i would need the graph to answer the question