(Choose 1 answer)
When only the superclass in the generalization/specialization relationship is mapped to the relational table.Which of the following is NOT true?
A. All the subclass attributes are brought up to the superclass table
B. The discriminator is added as an attribute of the superclass table
C. This approach can be used if the superclass has many attributes, each subclass has only a few attributes,and there are a small number (two or three) of subclasses
D. The superclass table includes only attributes of the superclass and attributes of subclasses
