Which of the following best describes the subject matter of the realism period?

Need plz? due in 10 will give brainliest which of the following was the most significant aspect of revel's election to the senate? a. his election showed that the u. s. would quickly move past the civil war. b. his election to uphold the thirteenth and fourteenth amendments which gave freed slaves citizenship and voting rights. c. his election demonstrated the states were united in a union once more. d. his election was the first step in opening doors for other african-american political leaders.

Here’s the first one let me send the next page of the passage

Why is it useful for historians to base certain studies on the analysis of historical periods