How many american soldiers who served in the vietnam war were drafted? more than 90 percent of all soldiers about two-thirds of all soldiers about one-third of all soldiers less than 10 percent of all soldiers

about one third of the solilders

"about one-third of all soldiers"

Explanation:

the answer is title i subtitle b

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: