Answer: • AD and BC are the two most commonly used to mark dates
• The AD and BC system makes it easier for historians to consistently document and study historical events
• Chronology means arranging events in the order in which they occurred
• A timeline is a line, chart, or graph that shows a series of chronology events
•Timeline and chronology help to compare the development of different events in relation to one another
Explanation:
Are there multiple options or is this free hand?
C is the answer Delaware was the first state to ratify, on December 7, 1787. After New Hampshire became the ninth state to ratify, on June 22, 1788, the Confederation Congress established March 9, 1789, as the date to begin operating under the Constitution.
