Answer: Affinity pattern
Explanation:
Data mining is when patterns are being discovered in large data. From the question, we are informed that Chenrezic Music Stores, a chain of stores selling musical instruments, is trying to improve its customer service.
We are further told that while examining its checkout data, it learned that people who buy guitar covers also buy guitar straps and vice versa. In this
This shows that data mining has helped to find better ways to improve customer service has also led to the discovery of affinity pattern.