Which of the following would most likely be used by a marketer gathering customer insights about unmet and unrecognized customer needs?

A) trendspotting
B) in-depth interviews
C) data mining
D) loyalty surveys

In-depth interviews provide the opportunity for the marketer to have in-depth, one-on-one conversations with customers to gather insights about their experiences, behaviors, and unmet needs. This allows the marketer to gain a deeper understanding of the customer's perspective and uncover unrecognized needs. Trendspotting, data mining, and loyalty surveys may provide some insights, but they are less likely to uncover unmet or unrecognized needs.