Final answer:
The families chose Albert Dussel, a dentist, to hide as the eighth Jew.
Step-by-step explanation:
When the families decide to take in an eighth Jew to hide, they choose Albert Dussel, a dentist. Albert Dussel was a real person who shared hiding quarters with Anne Frank and her family in the Secret Annex during World War II. Despite the cramped living conditions, their hiding place provided temporary safety for several Jewish people who were trying to avoid being captured by the Nazis.