In the Mexican War of Independence, indios and mestizos participated by:
A. By fighting with Miguel Hidalgo against Spanish and Creole troops.
This answer is correct because indios (indigenous people) and mestizos (people of mixed European and indigenous descent) played a significant role in supporting Miguel Hidalgo, a priest who led the early independence movement in Mexico. They fought against Spanish colonial rule and the Creole elites who were loyal to Spain. Miguel Hidalgo's leadership attracted a diverse following, including indios and mestizos, who sought to overthrow Spanish dominance and gain independence for Mexico. Their involvement was crucial in the early stages of the independence movement, highlighting the widespread desire for freedom and self-determination among different social groups in Mexico during that time.