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

Question

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.

Answer 1

The most important detail to include in a summary of the excerpt is that someone unknown betrayed the hiders, and they were taken away at gunpoint.