"After Mexican troops tried to stop him from going to see his family, he volunteered for service with the Texans." From this sentence we can assume that ______.

A．the only way for him to see his family was for him to become a captain
B．Smith was angry with the Mexican troops for keeping him from his family
C．The Mexicans stopped him because he was married to a Mexican woman
D．Smith was friends with the Mexican troops who stopped him