¿A quienes superaron los Incas en los conocimientos científicos? a. a los Zapotecas
c. a los Mayas y Aztecas
b. a los Toltecas
d. a los Mixtecos
Please select the best answer from the choices provided

When could you attach the direct object pronoun to an infinitive verb? a: when an infinitive verb follows a conjugated verb. b: when an infinitive verb ends in a question. c: when a stem-changing verb ends in a question. d: when a stem-changing verb follows a conjugated verb.