Which sentence best states the theme of this excerpt? The outsiders

Read this excerpt from The Outsiders.

Soda tries to understand, at least, which is more than Darry does. But then, Soda is different from anybody; he understands everything, almost. Like he's never hollering at me all the time the way Darry is, or treating me as if I was six instead of fourteen. I love Soda more than I've ever loved anyone, even Mom and Dad.

Which statement best states the theme of this excerpt?

People are alike inside.
Hardship builds character.
Kindness creates loyalty.
Appearances can be deceptive.

Kindness creates loyalty.

Hope this helps!