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

Which of the results of cultural blending do you think has the most lasting effects on a country

Due to seriouse dogmatic differences between the orthodox church and the western christian churches, the orthodox xhurch is not in communication with the roman catholic and protestant communities

What were some reasons the russian people grew to oppose world war i? check all that apply.millions had been killed.food and supplies were running out.the tsar had been overthrown.soldiers were forced to fight.industrialization was happening too quickly.