Final answer:
The factors that determine service facility opening hours include customer needs, economics, and competitor hours, with all three being significant in the decision-making process.
Step-by-step explanation:
The key factors determining the opening hours of a service facility are customer needs, economics of opening hours, and competitor opening hours. These elements are intertwined in guiding how a business should allocate its operational hours. Customer needs dictate when the services are most in demand; by being available during those times, a business caters to its clientele most effectively. Economics of opening hours encapsulates considerations such as staffing, operational costs, and potential revenue during certain times. Lastly, competitor opening hours are often taken into account to ensure that a business is competitive and accessible when similar services are offered by other companies. Therefore, the correct answer is e.