She was a pioneer in developing Baile Folklorico, and in 1952, Hernández founded the Mexican Folkloric Ballet with only 8 dancers. By 1959, the ensemble had grown to 60 performers. It was commissioned to represent Mexico at the Pan American Games in Chicago, Illinois, in 1959. Navarro created over 60 choreographies in her lifetime.
Since 1960, Hernández's Ballet Folklórico de México has performed without interruption Sunday mornings and Wednesday evenings at the Palace of Fine Arts in Mexico City.
Additionally, she founded the Folkloric Ballet School in Mexico City. Her brother, architect Agustín Hernández Navarro, designed the building in 1968.
Answer: b: since 1959
Explanation: The first time that the Amalia's ballet preformed at the Palacio de Bellas Artes in the year 1960, but the "contract" was done in the year 1959, so the correct answer will be the option b: since 1959
