Starting in the 1960s Researchers Predicted That Flat -Screen Televisions

Multiple Choice

Starting in the 1960s researchers predicted that flat -screen televisions produced with liquid display crystal displays (LCD would be sold to the public. But technical problems delayed the manufacture and sale of LCD televisions until the late 1990s. What was this technical problem?

A) Until the 1990s only very small screens could be economically produced. These screens were not popular with consumers. New technology resulted in larger screens.
B) There was no way to make very thin, clean television screens until 1999 when Corning, Inc. finally developed a process to do this.
C) It was not until the 1990s that satellite television signals enabled consumers to watch programming from many countries. This led to a large increase in demand and made the sale of LCD televisions profitable.
D) Until the 1990s relatively few channels were available for consumers to watch. After cable and satellite television became popular consumers were able to watch many more stations; this led to an increase in the demand for LCD televisions.