Final answer:
The best question for Brett to assess a candidate for a customer-facing position is asking them to describe a situation where they had to solve a conflict.
Step-by-step explanation:
The BEST question for Brett to ask to assess a candidate for a position dealing directly with customers who have questions or concerns is:
Can you describe a situation where you had to solve a conflict?
This question will help Brett evaluate the candidate's ability to handle difficult customer situations and find effective resolutions. The candidate's response can provide insights into their problem-solving skills, communication abilities, and ability to remain calm and composed under pressure.