Read this student draft about The Land, Part 2

In part 2 of The Land by Mildred D. Taylor, Paul covers for Mitchell by taking the blame for Mitchell’s mistake. This brings the two together. Paul explains, "Mitchell nodded, and that was as close as Mitchell Thomas came to thanking me and as close as I came to accepting his thanks. But after that, things began to change between Mitchell and me.”

What is the best concluding sentence for this draft?

Mitchell does not express his emotions openly.
Mitchell’s gratitude helps his and Paul’s friendship grow.
Mitchell’s nod shows that he respects Paul.
Mitchell realizes that he should improve his behavior toward Paul.