What approach should an app builder take to show Component as a related list on Product?

Universal Containers created a custom object called Component to capture details about products sold.

What approach should an app builder take to show Component as a related list on Product?
A . Create a master-detail relationship on Product to Component. Add the Component related list to the Product page layout.
B. Create a junction object to relate Component and Product. Add the Component related list to the Product page layout.
C. Create a roll-up on Product. Add the Component related list to the Product page layout.
D. Create a lookup relationship on Component to Product. Add the Component related list to the Product page layout.

Answer: D