Answer:
b. Only a limited number of people may use the facility in any given period.
Step-by-step explanation:
The calling population refers to population of potential costumers. The calling population can either be finite or infinite.
The finite calling population is a waiting line system with a specific, limited number of costumers that arrive at a facility or a limited number of people that are allowed to make use of a facility or service. A typical example of finite population calling is the telephone booth where only one costumer is allowed in a booth and others queue up waiting in line to use the booth.