Why would a researcher use a secondary source instead of a primary source when analyzing a historical event?
A. To hear about the event from someone who was directly involved
B. To understand how people felt during the period when the event happened
C. To see that event through the eyes of someone who witnessed it
D. To learn from the conclusions of many other experts on the event

A researcher would use the primary source of data to know exactly how the event took place. A secondary source is based on the historical event and records the historical events based on the event usage. Primary sources enable the researchers to critically analyse and study the historical event.

Explanation:

b or c ( this is because my answer is short so just ignore it)

i also think he is correct. i believe they came to washington to protest their rights.