Final answer:
The statement 'A3: Abigail Adams was the second of five children. Her father was a Congregationalist minister' presents the fact about Abigail Adams' family background.
Step-by-step explanation:
The fact presented in the statement "A3: Abigail Adams was the second of five children. Her father was a Congregationalist minister" is d) Abigail Adams' family background. This statement provides insight into her early family life, indicating that she grew up in a large family with her father being a religious leader. Moreover, the broader historical significance of Abigail Adams can be understood considering her marriage to John Adams, who was a prominent figure in American history, serving as a delegate to the Continental Congresses and later becoming the second President of the United States. Abigail Adams is also known for her advocacy for women's rights, as evidenced by her correspondence with her husband, wherein she urged him to "Remember the Ladies" in the new laws of the fledgling nation.