In a recent consumer survey, Brand X was rated as the most popular snack among teenagers, with 60% of respondents in this age group selecting it as their favorite. The survey also indicated that Brand Y, which was the initial market leader, has had a significant decline in popularity, with only 25% of teenagers now favoring it. Additionally, Brand Z, a newcomer to the market, has captured the remaining 15% of teenage preferences. Based on this survey, marketers for Brand X are concluding that they will soon become the top brand across all age demographics.
Which of the following, if true, would most strongly support the marketers' conclusion?