B. What kinds of shelters did Paleolithic people build or use, and why did they differ among groups? C. How did use of fire change the lives of Paleolithic people?
D. In what ways did Paleolithic people communicate?
E. Write a summary explaining how Paleolithic people adapted.

option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation:

b. 155 enlisted men and no officers

the manhattan project's indispensable man

im not sure on this one