Final answer:
The Seneca Falls Convention and the Declaration of Sentiments in 1848 marked the first organized effort for American women's rights, creating a A. true statement for the question posed.
Step-by-step explanation:
The statement that the Seneca Falls Convention and the Declaration of Sentiments marked the first time that American women organized for their rights as a group is A. True. This convention, held in July 1848 in Seneca Falls, New York, was the first national convention devoted to the issue of women's rights.
It brought together both men and women, approximately three hundred delegates, and led to the creation of the Declaration of Sentiments.
This document, modeled after the Declaration of Independence, declared the equality of men and women and listed grievances against the patriarchal system that had oppressed women.
It notably stated that men had taken from women the right to vote and to own property, highlighting the systemic issues that women faced.
The convention and the declaration were stepping stones towards the universal goal of women's suffrage and laid the foundation for future women's rights actions.