(Not related just helpful. can't not is a double negative. "I can't not leave'' means I can leave)
The biggest reason is probably we can even travel to Mars. Mars is only one planet away from us. the distance is to far for fuel and time. we would need to go much faster and a lot less fuel just to get to Mars.
I think your answer is
B. 179O's
Alexander Hamilton favored a strong central government and believed in a loose interpretation of the USA constitution. That means he believed everything the Constitution did not say, was allowed. This was the opposite of Thomas Jefferson's beliefs.
As a general in the army, Jackson lead several attempts to remove the Indians from land that the government wanted. From 1814-1824 he began negotiating with the tribes with treaties, to try and trade land with the Indians. In 1823 the Supreme Court ruled that Native Americans would only be able to occupy lands and were not allowed to hold a title on any particular land. When Jackson became president in 1830 he was able to get the Indian Removal Act signed into law. This was a way to force or negotiate with tribes to give up their lands in exchange for the rougher lands west of the Mississippi River.
Answer: Difficult rivers and diseases like malaria
Explanation: