【单选题】

Why did AIM organize a number of demonstrations from the late 192s through the late 1970s
A．To demonstrate their power and show their determination to fight against the government.

B．To draw public attention to the poor conditions of Native American reservations throughout the United States. and to protest the U.S. government's treatment of Native Americans and the loss of their ancestral lands.
C．To appeal to the people to invest more money on the Native American.
D．To protest the Vietnam War.