Passage Summary: George asks why ballroom dancing is suddenly a big deal again. Boris explains that it's because specific ballroom dances, like the merengue, became popular first.

Conclusion: The current popularity of ballroom dancing is due to the popularity of the merengue and related dances.

Reasoning: Since the merengue and related dances became popular in 1995, they have caused other types of ballroom dancing to become popular as well.

Analysis: Boris is trying to explain why a general category (ballroom dancing) became popular by pointing to the popularity of a specific member of that category (the merengue). This is essentially circular; it doesn't explain *why* the trend started, it just points to a different part of the same trend. Look for an answer that identifies this failure to provide a real external cause for the phenomenon George is asking about.