Which of the following statements about object oriented databse is not correct?

A、Eachobjecthasauniqueobjectidentityinthesystem.
B、Encapsulationandinheritancearetwoimportantfeaturesofobjectorienteddatabas
E、
C、Asubclasscaninherittheattributesandmethodsofallitssuperclasses.
D、Asubclassincludestheattr