Del Rio, Texas is a city on the border of Mexico that is considered a "gateway" to Mexico. Please select the best answer from the choices provided от OF

What did president roosevelt do to aid panama in becoming an independent country? a. he negotiated a peace treaty with nicaragua to purchase the land. b. he invaded colombia to establish a us base for defense. c. he placed warships around panama to block sea lanes. d. he used dollar diplomacy to block imports to nicaragua.