Which of the following statements regarding components of a product is correct?

The key components of a product include core features, consumable features and psychological features.

The consumable product is a key product component that contains the actual product.

A customer who purchases a security system for her home because it makes her feel safer is obtaining a psychological benefit from the purchase.

A complementary product provides a level of assurance for a purchaser with a company agreeing to replace, repair or return for a refund if a problem arises.