1. In a supertype subtype relationship

a.Subtype entities inherit attributes and relationships of supertype

b.All entity subtypes inherit their primary key attribute from their supertype

c.Entity subtypes inherit all relationships in which supertype entity participates

d.All of the above.

2.Third Normal Form is often as high as needed in normalization

True False

3. Characteristics of Primary Key include:

a. Must have unique values and should be intelligent

b. Should be non-intelligent and not change over time

c. Must not change over time and composed of several attribute