The Authors use historical times and events to make the story seem more believable even though its fiction. authors use historical events as their background because they enjoy the plot, the same storyline as just about any other historical/ fictional story for that matter
The reason the answer is C is Because the story explains John is always late and usually does not arrive on time. this means that John is rushing to get to the bus stop in two minutes, while he gets there in four minutes, he will likely be late for the bus.