The Roosevelt Corollary's purpose was to keep European powers out of the Americas (and thus out of the United States), it was meant to maintain the policy against foreign intervention in the Americas. It was also used to justify US power and intervention in other parts of the Americas.
The answer is B. how many generations had money
The Constitution does not directly mention secession, but the Supreme Court has consistently interpreted the Constitution to be an indestructible union. There is no legal basis a state can point to for unilaterally seceding. So basically, no, a state can not secede, it is blatantly illegal.
The development of a farming culture among pre-Columbian Native American Indians helped ensure a more stable food supply.