Francisco "Pancho" Villa attained power in Mexico through the use of American military forces. Option A is correct.
Francisco "Pancho" Villa was a military-landowner (caudillo) of the northern Mexican state of Chihuahua. He was a Mexican revolutionary general and one of the most prominent figures of the Mexican Revolution.
He was one of the Mexican Revolution general in which his militar participation was crucial in order to defeat the regime of President Victoriano Huerna.