1.choose the best answer
What is the primary difference between the relational database (RDB) and
object-oriented database (OODB) models?
A) RDB allows the definition of relationships between different tables, whereas OODB
does not allow this.
B) OODB incorporates methods with data structure definition, whereas RDB does not
allow this.
C) OODB supports multiple objects in the same database, whereas RDB supports only
tables.
D) RDB supports E.F. Codd's rules, whereas OODB does not support them.

Answer：D