Answer: The correct answer is option A: improve labor quality and establish legal associations in the form of trade unions.
Explanation: The Women's Trade Union League (WTUL) was established in 1903 with the goal of advocating for the improvement of labor conditions and the establishment of legal associations in the form of trade unions. The WTUL focused on supporting and organizing women workers in industries such as garment and textile factories, where they faced challenging working conditions and low wages.