Why did James Monroe and Robert Livingston act quickly to buy the Louisiana Territory? They felt that the purchase could stop a potential war between the US and France.
They knew that President Jefferson would disagree with the price and the amount of land.
They worried that President Jefferson did not have the authority to make the purchase.
They were afraid that Napoléon might change his mind and revoke the agreement.

 it is D, They were afraid that Napoléon might change his mind and revoke the agreement.

Explanation: the french was like yea and said he would sell all the land for 15 mill and they came only expecting just a little of the land so they wanted to act fast before he changed his mind

answer: ensure protection from communism

explanation:

the north atlantic treaty was largely dormant until the korean war initiated the establishment of nato to implement it, by means of an integrated military structure: this included the formation of supreme headquarters allied powers europe in 1951, which adopted the western union's military structures and plans.

sorry i cant