Following the napoleonic wars, the congress of vienna took steps meant to: a) prevent any european country from growing much stronger than it's neighbors b) encourage the growth of nationalists movements across europe. c) appease the french empire by granting it additional colonies in asia and africa d) relax restrictions on the atlantic slave trade in order to promote economic growth.

A) Prevent any European country from growing much stronger than it's neighbors

The Congress of Vienna allowed France to continue to keep it's military and police force, albeit they downsized the troop amount for France's army. They also wanted to make sure that France did not become too weak and either be taken over by another country, or have French citizens revolt.

~Rise Above the Ordinary, Senpai

not sure might be he acquired the entire oregon territory from great britain

roosevelt believed that in light of the country's recent military successes, it was unnecessary to use force to achieve foreign policy goals, so long as the military could threaten force. this belief, and his strategy of “speaking softly and carrying a big stick,” shaped much of roosevelt's foreign policy.