Twelve is federalism.
Thirteen is prove a legitimate public good and provide just compensation.
Is it more than one answer
D.
For example in New York, the Erie Canal was dug to connect Lake Erie in western NY to Hudson River in eastern side of NY.
Waterway built to allow ship travel vs. slower overland wagons etc.
How the present constitution can be change or amend in different ways?
The Constitution provides that an amendment may be proposed either by the Congress with a two-thirds majority vote in both the House of Representatives and the Senate or by a constitutional convention called for by two-thirds of the State legislatures.