The answer to this question would be choice C. Suffrage (the right to vote)
Explanation: Women have been a minority group that has often been overlooked as shown in part, by the history of the United States. Moreover, a notable circumstance in which people took a stance in order to defy the popular notions regarding women at the time the Declaration of Sentiments was proclaimed (in which people believed that women shouldn't be allowed to vote and that in a way they were to stay at home, do chores and take care of the children) was the Seneca Falls Convection of 1848.
For instance, arranged by leaders Elizabeth Cady Stanton and Lucretia Mott, the Seneca Falls Convection was a meeting held to advocate (support) women's suffrage (the right to vote). Thus, during this convection the Declaration of Sentiments was read, which was basically this document that told of grievances held among many women at the time. Moreover, it also kind of resembled the Declaration of Independence as it started in the following way: "We hold these truths to be self evident: that all men AND WOMEN are created equal..." This shows how the Declaration of Sentiments was a prominent step towards women equality and enfranchisement (A.K.A why the answer to this question is choice C).