Final answer:
Abigail Adams is distinguished as the first woman to serve as both the wife and mother of U.S. presidents.
Step-by-step explanation:
The correct answer is c) She was the first woman to serve as both the wife and mother of U.S. presidents. Abigail Adams is best known for being the wife of John Adams, who served as the second president of the United States, and the mother of John Quincy Adams, who served as the sixth president. She played an important role in supporting her husband's political career and was influential in advocating for women's rights during the American Revolution.