[单选题]4、Most important, television is educational. （5.0）

A、 Preschoolers learn colors, numbers and letters from public televison programs like Sesame Street.
B、 Watching television can be soothing and restful after an eight-hour day of pressure, challenges, or concentration.
C、 Science shows for older children, like Fun with Nature, go on location to analyze everything.
D、 Adults, too, can get an education (college credits included) from courses given on television.