I think the constitution prohibits the enactment of ex post facto.
Answer:
A. Alaska
Explanation:
On March 30, 1867, Secretary of State William H. Seward agreed to purchase Alaska.
The constitution of the united states sought to bring together the three concepts and thus define its own mode of government, based on these three concepts that the form of government is established in the united states. Having an influence of each one, some less than others but anyway, the US benefited from the three courses to make its own.
Answer:
I believe the answer is D.
Hope this helps.
Explanation: