Hello there! Yes, all of South America is below the Tropic of Cancer. The Tropic of Cancer is located at 23.5 degrees north, which includes part of northern and all of Central America, And all of South America is below that. Here is a map below:
The Constitution enumerates certain powers which are reserved to the federal goverment and other powers which are delegated to the state.
Those powers which are not explicitly related in the document to any of the goverment levels will automatically be reserved to and exercised by the supreme federal goverment.
A is the answer hope that helps
C.
Collusion is legal in the United States, but cartels are not.