Final answer:
An isolated service failure is why patients might switch service providers and is the answer to the student's question. This refers to a one-off incident that significantly affects the customer's perception of the provider.
Step-by-step explanation:
The student's question touches on why patients might switch service providers due to a single service failure. The correct answer is c) Isolated service failure. An isolated service failure refers to a one-time, non-recurring problem that a patient experiences with a service provider. These instances can significantly impact customer satisfaction and are often the primary reason for patients to consider switching to a different provider. Although the frustration may arise from a single incident, the effect on the patient's perception of reliability and quality can be substantial, leading them to seek services elsewhere.