What does Mr. Dussel think the thief will do with his knowledge about the noise in the attic?

Why do the Frank family and the Van Daan family move into the rooms in the top floor of the warehouse? ... They are hiding from the Nazis, who have been persecuting Jews. ... That no one will be able to get along with Mr. Dussel ... He may use his knowledge about the attic to blackmail the owner of the building

Explanation:

hope this helps --koki

true because it is true