Primary sources are valuable to historians because they give insight into the ways in which historical figures understood or internalized what they experienced, their place or significance in history, and give historians an understanding of historical figures' opinions.
South America : Argentina, Bolivia, Brazil, Chile, Ecuador, Colombia, Uruguay, Peru, Paraguay, Venezuela.
Answer:
A. a replication of studies
Explanation:
A researcher performs a previous study following the same procedures to see if she will get the same results.This is an example of a replication of studies.
Carrying out a previous research under the same exact conditions to see if the results will be the same is simply a replication of study. Replication of studies is necessary for the validation of results gotten from the previous research.