A: The invention of writing (first by the Sumerians) marks the beginning of "historic times" because it allowed historians to use written records rather than just archaeological artifacts to understand the past.
to ensure consistent engagement with historical material. New Journey Through History 1a Workbook Answer
It’s tempting to just fill in the blanks, but you’ll get more out of the "Journey" if you use the answers as a diagnostic tool: A: The invention of writing (first by the