Which of the following is an example of direct inquiry?

Direct inquiry involves directly soliciting information or responses from individuals, typically with the intention of gathering specific feedback or data. In this instance, asking a customer to fill out a survey after calling customer service is a clear example of direct inquiry because it actively engages the customer and requests their input on their experience. This method allows the business to collect data directly from the customer, ensuring that the information is more accurate and relevant to their individual experiences.

The other options represent methods of gathering information that do not involve direct questioning of individuals. For example, sending a follow-up email after a purchase might provide an opportunity for feedback but does not directly ask customers for specific information in real time. Observing customer behavior in-store is a passive form of data collection and provides insights based on observation rather than direct inquiry. Analyzing customer feedback on social media involves examining comments or reviews that customers voluntarily post online, which again does not constitute a direct inquiry as it lacks the solicitation of immediate responses in a structured manner.