Margaret Sanger is most known as an advocate for which cause?

• A. Prohibition
• B. Birth control
• C. Women's suffrage
• D. Labor rights

Answer: (B)

Advocacy for birth control and reproductive autonomy is the main concept here. Margaret Sanger dedicated her work to ensuring women could make informed choices about if and when to have children. She opened birth control clinics, published educational materials, and helped organize the movement that built the modern framework for family planning, ultimately contributing to the development of organizations that became Planned Parenthood. That focus—expanding access to contraception and discussing reproductive health openly—defines her most lasting impact.

Prohibition, women’s suffrage, and labor rights were important reform movements in their own right, but they aren’t the aspect of Sanger’s legacy that she's best known for.