Answer: B. Albert Fall
Explanation: John Collier was a sociologist, writer, an American social reformer and Native American advocate. He served as Commissioner for the Bureau of Indian Affairs in the President Roosevelt administration from 1933 to 1945. He was a huge proponent of American Indian culture and his appointment as Commisioner of Indian Affairs helped shape federal policy toward Native Americans, especially through the Indian Reorganization Act.
Albert Fall was a United States Senator from New Mexico and the Secretary of the Interior under President Harding, infamous for his involvement in the Teapot Dome scandal. As a captain in the United States Army he supported a military invasion of Mexico in 1916 as a means of ending the Pancho Villa's raids.
In 1921, Albert Fall was appointed Secretary of the Interior with the Bureau of Indian Affairs a part of the Department of Interior. He was openly hostile to Indian rights, particularly religious right and one of his first acts was to enforce the prohibition against the Plains Indian Sun Dance. Those who participated were to be jailed for 30 days in the agency prison.
Both mens' work with the bureau of Indian affairs didn't overlap and when Collier became the Commissioner of Indian Affairs, there was great religious freedom, among others for American Indians.