Which is the best source of historical evidence to learn about how an event unfolded?

According to article 2, what was george washington's major concern about the rebellion in massachusetts?

What was the main cause of the russian revolution? a. the protests against the war with poland b. the tremendous war losses of world war 1 c. the protests against the treaty of brest- litovsk d. the losses dictated by the treaty of versailles

How has the united states been influenced by other countries ?