Investment into ______ in the 1990s pushed the stock market to incredibly high levels, but lack of interest into invested companies led to a stock market crash in the 2000s.

A) television
B) dot-com companies
C) cellular phone companies
D) all of these

The correct answer is dot-com companies. The 1990s saw a significant investment boom in internet-based companies, often referred to as the dot-com bubble. This period was marked by rapid stock market growth as investors poured money into these startups, many of which had yet to turn a profit. The bubble burst in the early 2000s, leading to a stock market crash as interest and investment in these companies rapidly declined.