Which feminist pioneer was the first woman to use her maiden name on her passport and on her daughters' birth certificates?

The correct answer is Betsy Plank, who is recognized as a pioneering figure in public relations and women's rights. She was influential in advocating for the acknowledgment of women's contributions in the workplace and is often celebrated for her efforts to promote gender equity. By using her maiden name on her passport and her daughters' birth certificates, Plank made a significant statement about women's identity and autonomy, challenging societal norms of her time that typically required women to adopt their husbands' names. This act served as a broader symbol of empowerment for women and helped to advance discussions about gender equality in both public relations and society at large.

The other figures mentioned, while notable in their fields, do not have historical records associated with this specific act of using maiden names, which makes Betsy Plank's achievement unique and pivotal within the context of feminist movements and public relations history.