Which statement best explains how the organizational structure of the passage helps develop the main idea? Passage: In the novel Farm Boys, Marty and Kevin are twins, but they are not alike in every way. The boys both grow up on the family farm in Iowa, helping with chores and going to school together. They even share clothes and books. However, Marty is much more serious and hardworking than Kevin, who just likes to have a good time. When it's time to split rails for the fence, Marty goes out early with a sharp ax, but Kevin is nowhere to be found.

A: The compare-and-contrast structure gives reasons why Marty and Kevin are well-written characters in order to evaluate the writing of the novel Farm Boys.

B: The compare-and-contrast structure describes Marty and Kevin in order to show how the twin brothers are alike and how they are different.

C: The problem-solution structure identifies the mistakes Kevin makes in order to suggest ways he could be more like Marty.

D: The chronological structure details the boys' childhood on a farm in order to illustrate the way farm life has changed over time.