Read the following excerpt from "Woman Who Helped Hide Anne Frank Dies at 100" by Teri Schultz. SCHULTZ: But Gies clearly was very special, even when someone still unknown betrayed those she called the hiders and they were taken away at gunpoint to death camps. Gies was not intimidated. She sneaked back into the secret hideaway to try to preserve any belongings of the Franks that hadn't been destroyed or taken. And there she found what would eventually become a treasure of the entire world.

Which detail is most important to include in a summary of the excerpt?

Someone unknown betrayed the hiders, and they were taken away at gunpoint.
Gies was very special and not intimidated even after the Franks were taken.
Gies sneaked back into the hideaway to preserve the Franks’ belongings.
Miep found Anne’s diary, which would eventually become a treasure.