The correct answer is B. The siblings must choose whether to fight a war.
Step-by-step explanation
According to the time in which this story is given context, it can be inferred that the context is during the war of independence of the United States from British rule because this conflict occurred between the years 1775 and 1783. However, disputes for independence began years before. In addition, two young men were at an appropriate age to participate in the conflicts of the War of Independence. Therefore, according to the historical context of the story, it can be inferred that the best example of the development of the plot is C. The brothers must choose whether to fight in a war.