The type of research that the business analyst should use to elicit user stories from UC’s customers is interviewing. Interviewing is a technique that involves asking open-ended questions to stakeholders or users to gather information and feedback about their needs, expectations, preferences, pain points, goals, etc. Interviewing helps to elicit user stories from UC’s customers by allowing them to express their opinions and experiences in their own words, as well as clarifying any doubts or ambiguities. Interviewing also helps to build rapport and trust with the customers and show them respect and appreciation for their input. References: https://trailhead.salesforce.com/content/learn/modules/salesforce-business-analyst-certification-prep/customer-discovery