Which of the following methods would provide the most specific feedback on menu items?

Leading a focus group is the most effective method for obtaining specific feedback on menu items because it allows for in-depth discussions and interactions among participants. In a focus group setting, individuals can share their thoughts, opinions, and suggestions about the menu items in a collaborative environment. This method encourages participants to build on each other's feedback, explore various aspects of the menu in detail, and reveal preferences or concerns that might not surface through more structured methods.

Focus groups also provide an opportunity for the facilitator to probe deeper into participants’ responses, clarifying points and uncovering underlying attitudes towards specific menu items. This qualitative data can be analyzed for themes and insights, making it richer and more nuanced than simple ratings or comments. In contrast, while other methods such as comment cards, satisfaction surveys, or individual interviews can gather feedback, they generally do not foster the same level of interactive discussion that can yield more specific and actionable insights.