The answer is A “Through military action by the united states”
Answer: Andrew Jackson helped to expand the powers of the Presidency. In May 1830, Jackson signed the Indian Removal Act into law. This legislation expanded the powers of the Presidency to speed the removal of Indian communities in the eastern United States and territories that were west of the Mississippi River
National border is the type of border among the following choices given in the question that would likely have the most protection. The correct option among all the options that are given in the question is the third option or the penultimate option. I hope the answer helps you.