What aspect of the economy significantly benefited middle and lower class incomes during the 1990s?

The answer is rooted in the economic context of the 1990s, a period characterized by significant growth and expansion in the United States economy. During this decade, the economy experienced one of its longest periods of expansion, driven by advances in technology, particularly in the information technology sector. This growth led to a rise in productivity and, as a result, improved opportunities for employment across various sectors.

Middle and lower-class incomes saw their first real gains during this period due to several factors. There was a notable decrease in unemployment rates, which allowed more individuals, including those from these income groups, to find jobs. Furthermore, the overall prosperity of the economy led to increasing wages, especially in tech-related industries, which provided a trickle-down effect that helped improve living standards for many.

This improvement in income levels was also complemented by policies that fostered economic growth and employment. These dynamics significantly contrasted with other options such as decreased job opportunities or increased taxation, which would not typically lead to wage gains for these groups. Thus, the correct answer reflects the significant economic improvements that benefitted middle and lower-class incomes during the 1990s.