True because that will be much more afffectibe outcome which will result as in effect
Pre-Columbian = pre-1492
Age of Exploration = 15th century - 18th century
Colonial Era = 16th century - 20th century
Revolutionary Period = 1764-1789
The best example of a primary source among these options that you've mentioned is an interview with her dad who is a Vietnam veteran. She can get all the details she needs from a person who was actually there.
