I believe the correct answer is D, based on my general knowledge.
Hope I helped. ^ω^
American expansion abroad was fueled by all of the following except "the closing of the frontier" since this was mainly a domestic issue.
By increasing prices, minimizing lay-offs, keeping wage rates at normal levels.
Increased prices would (supposedly) satisfy employees and business owners.
In 1787, delegates met in PA. They came from all of the 13 states except Rhode Island~
He used the money from the Delian League's treasury to make the Athenian navy the strongest in the Mediterranean