Final answer:
Products sold exclusively through specialized vendors like beauty or barber supply houses are considered 'Restricted' as only certain consumers have access. This exclusivity aligns with the concept of excludable goods in business, where access is limited to paying customers or specific groups.
Step-by-step explanation:
The student's question pertains to the types of products that are available only through specialized vendors, such as beauty or barber supply houses, and not to the general public. These are excludable goods because access to these goods is restricted to certain groups of consumers—typically, those who are professionals in the field and are willing to pay for them. Reflecting on the choices provided: A) Exclusive, B) Restricted, C) Common, D) Expensive, the correct answer is B) Restricted. To illustrate this concept, consider how primary education can be offered by private companies, making it excludable as only paying customers can access it, similar to the way companies sell cell phone service and exclude non-paying individuals. Furthermore, private goods, such as a slice of pizza, are rivalrous, meaning they can't be enjoyed by more than one person at the same time, representing another form of exclusivity within goods and services.