How should the admin configure CPQ so users are unable to add this Product outside of a bundle?

Universal Containers has Products that should only be selected as part of a bundle

How should the admin configure CPQ so users are unable to add this Product outside of a bundle?
A . Remove the Product’s Pnce Book Entry, then set Unit Price on the Product Option record.
B . Ensure that the Configuration Event field on the Product is set to Always.
C . Ensure that the Component checkbox on the Product is set to TRUE.
D . Create a Product Rule with a Remove action when the Product i* sold a la carte.

Answer: C