Which of the following explains why national security was an issue in the annexation between Texas and the U.S.?(1 point) Responses Mexico thought that Santa Anna signed the Treaty of Velasco of his own free will. Mexico thought that Santa Anna signed the Treaty of Velasco of his own free will. Mexico did not agree to the validity of the Treaty of Velasco after the Texas Revolution. Mexico did not agree to the validity of the Treaty of Velasco after the Texas Revolution. Rangers moved to Texas to protect against an uprising if Mexico tried to rebel. Rangers moved to Texas to protect against an uprising if Mexico tried to rebel. Mexico agreed that the border of Texas was the Rio Grande, as the Treaty of Velasco stated.
