The distribution of powers among the three federal branches- The Congress, The President and The Judiciary and between the national and the state governments had a positive impact on policy making. In this system there is the check and balance among the three branches which leads to criticism of wrong policies and adoption of good policies. More importantly the policies are discussed by the federal and state government as well and the decisions are taken on the basis of consent which ultimately leads to adoption of efficient policies by the government.
The answer is B. Because this was their transport to get round coastlines and down rivers.
Answer: choosing senators through direct election
I believe the answer is A, because the Mayans were located right underneath the Guatemalan peninsula(which is that little island looking piece above A).