Which would a historian use most often to research people or events from the past?
a. old books and papers
b. old buildings and ruins
c. old tools and pottery shards

Which conditions did austria demand of serbia after the assassination of archduke ferdinand? check all that apply. 1. swearing allegiance to the triple alliance 2. accepting responsibility for the assassination 3. turning over control of its military operations 4. surrendering half of its most fertile lands 5. suppressing anti-austrian groups and publications

How w.e.b. dubois wanted to improve the social and economic situation that existed for african americans during the early 19th century?

Who did the first work in creating vaccines