Final answer:
Option (B), The declaration that 'woman is man's equal—was intended to be so by the Creator' from the Declaration of Sentiments best supports the main idea of the paragraph, underlining the equality and rights women advocated for at the Seneca Falls Convention.
Step-by-step explanation:
The most supportive text from the paragraph that best supports the main idea is option B) The Declaration of Sentiments stated that "woman is man's equal—was intended to be so by the Creator." This statement is fundamental as it captures the essence of the Seneca Falls Convention and the revolutionary idea that men and women are created equal which was asserted in the Declaration of Sentiments.
The declaration was a critical document from the first-ever convention to address women's rights and initiated the ongoing fight for equal treatment and suffrage for women.