Which of the following primary sources would be most valuable for understanding the impacts of Europeans on the Americas during the Age of Exploration?

a. A personal diary written by a European explorer recounting their experiences and observations in the New World.
b. Official documents from the European colonial government detailing economic policies and governance in the Americas.
c. Oral histories and traditions passed down through generations within Native American communities.
d. A treaty between European powers outlining the division of territories in the Americas.

a. A personal diary written by a European explorer recounting their experiences and observations in the New World would be the most valuable primary source for understanding the impacts of Europeans on the Americas during the Age of Exploration. This source would provide a first-hand account of the encounters between Europeans and Native Americans, including descriptions of interactions, observations of cultural differences, and insights into the motivations and mindset of the European explorers. It would offer valuable insights into the immediate impacts of European arrival on the Americas.