Which of the following is an example of a person demonstrating being an insider?

Being an insider implies having knowledge or awareness about something that is not widely known or understood by the general public, often providing an edge in social contexts or specialized environments. In this scenario, knowing about a great new restaurant that is hidden away in an inconspicuous location exemplifies this concept effectively. It indicates a level of insider knowledge that goes beyond superficial information and reflects an understanding of localized culture or niche experiences, which can contribute to a more personalized and informed outing.

In contrast, having Mexican pesos in your wallet when going out does not indicate exclusive knowledge; it merely reflects currency availability. Taking a friend to McDonald's because of a personal preference for their coffee also lacks the element of unique or specialized knowledge. Lastly, buying trendy clothing from a popular store represents participation in mainstream fashion rather than showcasing insider insights. Therefore, the correct answer is aligned with the essence of being an insider through specialized knowledge that enhances experiences.