Which developments of the 1920s contributed to an improvement in the American standard of living? Select four options.

greater amount of leisure time
better means of communication
increased availability of automobiles
more effort to save money for the future
more types of entertainment from new technology

although world war i began in 1914, the united states did not join the war until 1917. the additional firepower, resources, and soldiers of the u.s. to tip the balance of the war in favor of the allies. remaining neutral. when war broke out in 1914, the united states had a policy of neutrality.

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

with my recent question