The entity relationship model below shows the relationship between Customer and Order. Which of the following business rules is correct?
A) An order may be placed by many customers.
B) A customer may place many orders.
C) A customer may never place an order.
D) An order need not be placed by a customer.

Question

The entity relationship model below shows the relationship between Customer and Order. Which of the following business rules is correct? 
A) An order may be placed by many customers. 
B) A customer may place many orders. 
C) A customer may never place an order. 
D) An order need not be placed by a customer.

Quizplus · Accepted Answer

The entity relationship model shows a one-to-many relationship between Customer and Order, indicating that a customer may place many orders but an order can only be placed by one customer. Therefore, Option B is the correct business rule. Option A contradicts the model, Option C is possible but not supported by the model, and Option D also contradicts the model.

The Entity Relationship Model Below Shows the Relationship Between Customer