Respuesta :
Most espionage during the Civil War was fieldwork that included observation, scouting, and interrogation of prisoners.
Answer: 3 Most espionage during the Civil War was fieldwork that included observation, scouting, and interrogation of prisoners.
Explanation: in the given excerpt from "The Dark Game" we can see the description of how little the ways of spying the enemy's army had changed in the years between wars. It said that during the Civil War photography and telegraph were incorporated, but the majority of the espionage was done with fieldwork that included observation, scouting, and interrogation of prisoners, so the correct answer is option 3.