Why do we not know much about the Olmecs? No one can decipher their writing

Their artifacts did not survive time

Some do not believe they existed

c

Explanation:

no one knowd

Explanation:

no one know what happened to them

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.