What did most americans understand before their country entered world war i?
o that the war would not last long
o that the war would cost american lives
o that the war would the us economy
o that the war could be won by the us alone

None of the options here are good.

Explanation:

American public opinion was divided and there were many views before the war.

The US joined the Allied effort, so nobody thought it could win alone.

Economic benefit was never a major thinking current in public opinion in the USA.

People didn´t expect their country to suffer so many casualties, but that a country will suffer causalties if it enter a war is obvious.

When the US entered WWI, the conflict had been going on for 3 years already, so people could not expect the war to be short-lived.

i know social security wasn't one.

explanation:

hope my answer has you!

"globalization has greatly impacted the united states and american citizens. first and foremost, globalization has spread american influence throughout the world. globalization has opened up more markets for the united states, which in effect american companies sell their products worldwide. there has been a rise of multinational corporations and their influence has greatly increased."