Which group led the Woman's Air Derby?

The correct answer highlights the organization known as The Ninety-Nines, which was established in 1929 as the first organization for female pilots. Founded by 99 women aviators, the group aimed to promote advancement and opportunities for women in aviation. The Woman's Air Derby, held in 1929, was a significant event that showcased the skills of female pilots, and it was organized by The Ninety-Nines. This organization played a vital role in fostering a sense of community among women in aviation and advocating for their rights within the industry.

Other groups listed may also relate to women in aviation but do not specifically pertain to leading the Woman's Air Derby. For example, The Aviatrixes, The Flying Women, and The Airwomen Association may not have gained the same historical prominence or direct connection to this specific event as The Ninety-Nines did.