Answer the following question in paragraph form (5-7 complete sentences). Be sure to check your grammar and spelling, Describe the development of the railroad industry after the Civil War, and explain the effects of this industry on economic development in the second half of the 1800s.

Ahistorian has discovered a letter written by an early roman emperor. she translates the letter and discovers that it contains orders to a general before a battle. she works to determine when the letter was written to figure out which battle the letter references.the historian in the passage is most clearly demonstrating which historical thinking skill? a. identifying causes and historical contextb. thinking chronologicallyc. making and evaluating arguments and interpretationsd. analyzing historical sources