What economic trend characterized the boom of the 1990s?

During the 1990s, the U.S. economy experienced significant growth, often referred to as the "dot-com boom," driven by advancements in technology, particularly in information technology and the internet. This period saw substantial increases in income across various sectors, contributing to rising consumer spending and investment.

The economic prosperity was reflected in various indicators, including stock market gains and the expansion of businesses related to technology and services. Many individuals benefited from job creation in these sectors, leading to income increases for a broad range of workers, which helped sustain consumer confidence and expenditure, further fueling economic growth.

The other options do not align with this economic trend. During the boom, inflation was relatively controlled, unemployment rates were low, and there was actually an increase in service jobs rather than a decrease, as the economy shifted toward a more service-oriented structure.