Which group of consumers in the United States has an increasing influence on mainstream U.S. culture with buying power that was projected to reach $1.3 trillion in 2015?

The correct answer is the Hispanic group of consumers. This demographic has shown remarkable growth in both population and economic influence within the United States. By 2015, it was projected that their buying power would reach $1.3 trillion, reflecting not only their increasing numbers but also their ability to drive trends and commerce in the wider market.

Hispanics influence various sectors, from food and fashion to technology and entertainment. Their cultural contributions, alongside their significant purchasing power, have made them pivotal in shaping mainstream U.S. culture. This influence continues to expand as the demographic becomes more integrated into various aspects of society, offering businesses valuable opportunities for targeted marketing and engagement.

The other groups, while also significant, have not shown the same rapid growth in both representation and economic power in relation to U.S. culture. For instance, Baby Boomers are a substantial consumer group but their overall buying power is decreasing as they age into retirement. Millennials, while influential particularly in technology and social trends, do not have the same collective buying power as the Hispanic community at that time. African Americans also represent an important market, but their collective financial influence does not match that of the Hispanic demographic in the specified timeframe.