Answer:
The correct answer is:
people who do not pay can be easily prevented from using the good. (d)
Step-by-step explanation:
Excludable goods or services are those to which the consumer cannot have access unless payment of some form is made. By contrast, a non-excludable good or service is one to which the consumer cannot be prevented from using even without payment. Excludable goods can be further divided into rivalrous and non-rivalrous.
A rivalrous excludable good or service is one in which usage by a consumer or usage by one party prevents or reduces significantly, its use by another consumer or party examples are goods such as clothes, food, cars etc, while non-rivalrous excludable goods/services include tv subscriptions, cinemas, etc.