Answer:
i am pretty sure the it is b but not sure
Explanation:
Hope that this helps
D. 18th Century, 19th Century, 20th Century.
<span>John Collier (May 4, 1884 – May 8, 1968),
a sociologist and writer, was an American social reformer and Native
American advocate. He served as Commissioner for the Bureau of Indian
Affairs in the President Franklin D. Roosevelt administration, from 1933
to 1945.</span>
Explanation:
Paleontology is the study of the history of life on Earth as based on fossils. Fossils are the remains of plants, animals, fungi, bacteria, and single-celled living things that have been replaced by rock material or impressions of organisms preserved in rock.