Answer:
The understand of history, and its study has changed over the period.
Explanation:
The change has occurred in the study of history and the way of thinking gradually as with years passing. History in the previous period was more reliable on the few discoveries with little knowledge of the region. It has remained unreliable in assessing future change. The recent changes are the development of technology in discovering and the internet, which gave access to materials on a vast level. Critical thinking is vital for understanding history as once a person search into the past. A continuous search for primary sources and examine ancient or medieval history with reading the sources, one can quickly learn that some of past sources are suspect.
Johannes Gutenberg invented the printing press
Two key events led to its being named the Negro National Anthem: In 1905, Booker T. Washington endorsed it, and in 1919, it became the official song of the NAACP.
