What is one way that historians can establish the authenticity of a primary source

The victory of andrew jackson in the presidential elections of 1828 was aided by (1) the support of eastern bankers (2) implementing woman's suffrage (3) reducing property qualification for voting (4) the endorsement of northern abolitionists

Was president roosevelt justified in ordering executive order 9066, which resulted in the internment of japanese american citizens? write a clear claim that responds to this writing prompt.

Who was a worker and a powerful leader in corinthian and ephesian churches