${?}^{\text{A}\text{B}\text{C}}$ RETALLER $($ERO$)$

We the ER Diagram for the ABC Retailer:

${?}^{4BC}$ RETALLER $($ERD$)$

Which of the following is true according to the ABC Retailer ER diagram?

Some brands have no products

Every product is associated with a promotion

Some products belong to no brands

All of the above

None of the above