Answer:
C. Maintain control of the U. S. borders and protect citizens
Step-by-step explanation:
When the U. S provided rail transportation through the United States, from Eagle Pass, Texas to Douglas, Arizona, for the movement of more than 5,000 Carrancista forces to fight Villa at the Battle of Agua Prieta, Pancho Villa felt betrayed and began attacking U.S. nationals and their property in northern Mexico. Therefore the expedition of Villa began.