ABC RETAILER Observe the ER Diagram for the ABC Retailer

Multiple Choice

ABC RETAILER
Observe the ER diagram for the ABC Retailer:

This ER diagram will be used for the following questions citing ABC Retailer ER Diagram.
-Which of the following is true according to the ABC Retailer ER diagram?

A) Each promotion has a unique promotion name
B) Each brand has a unique brand name
C) Each product has a unique product ID
D) All of the above