What is the incorrect statement about Data Access Object (androidx.room.Dao)?

What is the incorrect statement about Data Access Object (androidx.room.Dao)?
A . Data Access Objects are the main classes where you define your database interactions. They can include a variety of query methods.
B . The class marked with @Dao should either be an interface or an abstract class. At compile time, Room will generate an implementation of this class when it is referenced by a Database.
C . An abstract @Dao class can optionally have a constructor that takes a Database as its only parameter.
D . It is recommended to have only one Dao class in your codebase for all tables.

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Answer: D