Answer:
The correct answer is C. Antonio López de Santa Anna's reward for helping Mexico win the war for independence from Spain in 1821 was that he was made commander in chief of the Mexican army.
Step-by-step explanation:
In June 1810, the same year that Miguel Hidalgo began his work for independence from Spain, at the age of 16, Santa Anna became a cadet in the Fijo de Vera Cruz Infantry Regiment, within the Spanish colonial army. Here he received training in dealing with nationalist rebels. The following year, he was wounded by an arrow through his left arm.
Santa Anna advanced rapidly and became ensign in February 1812 and lieutenant already at the end of the same year. In 1813 he served in Texas, where he excelled in the Battle of Medina, not far from present-day San Antonio. This was followed by a period in which the War of Independence had ebbed somewhat, and Santa Anna became more passive. In 1816 he was promoted to captain.
In 1821, Santa Anna expressed loyalty to Agustín de Iturbide. Santa Anna made a name for herself by immediately driving the Spanish forces out of the important port city of Veracruz the same year. Iturbide rewarded him by appointing him general.