Answer: B) to emphasize Zeitoun’s unwavering faith.
Step-by-step explanation: In the given excerpt from "Zeitoun" we can see the speaker talking about how the kids are growing stronger. From the given options, the one that represents the reason why the author include the musings, is the corresponding to option B: to emphasize Zeitoun’s unwavering faith, we can see that in the phrase "he needs to show them that God had a reason for their trials. He tells them that perhaps God, by allowing him to be jailed, saved him from something worse."