Read the following excerpt from an intercalary chapter in The Grapes of Wrath in which a tractor driver discusses the future:
"Times are changing, mister, don't you know? Can't make a living on the land unless you've got two, five, ten thousand acres and a tractor. Crop land isn't for little guys like us any more. You don't kick up a howl because you can't make Fords, or because you're not the telephone company. Well, crops are like that now. Nothing to do about it. You try to get three dollars a day someplace. That's the only way."
By including this intercalary chapter, what effect is Steinbeck most likely attempting to achieve?
A: Breaking from the narrative flow of the novel to advance his purpose and perspective on crop rotation
B: Providing commentary, separate from the narrative, which illustrates individual experiences during the Great Depression
C: Creating a secondary narrative that runs parallel to the primary narrative but uses different characters and plot
D: Giving readers a better understanding of the background of changes in communication and transportation at the time
