The correct answer is A. Each woman discovers a way to support herself during difficult times.
Step-by-step explanation:
In literature, parallel plots refer to two or more different plots or sequence of events that developed in one story and usually share a common character or an underlying idea called theme. In the case presented, the plots share common features as in both a woman is the main character and in both a woman has to find a way to support herself and be independent during war, this can be seen in the case of plot one "A woman runs the farm by herself when her husband leaves to go fight in the Civil War" as the woman learns to run the farm and in the case of plot two "A woman gets a job to support herself while her husband is fighting in World War II" this occurs as the woman decides to work in a factory. Therefore, both plots are similar because they both depict a woman who learns to support herself during war or during difficult times (Option A).