Which of the following would be against the Constitution? A: Congress declares war on a country, and the president sends troops.
B: Canada and the United States meet to create to create a new trade agreement.
C: Connecticut voters select two senators to represent them in Congress.
D: California begins to coin and print currency for use within the state.

D.

Explanation:

Making counterfeit money is against the law.

All the others can happen legally.

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories

an expansion is one of two basic business cycle phases; the other is contraction. the transition from expansion to contraction is a peak, and the changeover from contraction to expansion is a trough.