What is the most likely reason for the march?
to protest slavery
to demand workers' rights
to demand women's suffrage
to protest child labor

In the picture that corresponds with this question, you can see a protest that is occurring in a peaceful manner. The protest most likely represents a protest that is in demand of women's suffrage. Women's suffrage was the movement (and still is) that demanded equal rights for women in the United States of America.

Explanation: or just C