What is the main idea of this paragraph?

Reality shows are the new trend in the television arena. Originally, reality shows presented real-life events. But over the years, the picture has changed a bit. Not all reality shows today present real-life events. Many of these "reality" shows are scripted. They take place on studio sets and rented locations. Participants often must act and speak according to a script. Many viewers believe these scripted events are actually unscripted. Reality show producers stage dramatic events to gain higher ratings.

A.
Participants in reality shows have no sense of shame or self-respect.
B.
Scripted events are added to reality shows to improve viewer ratings.
C.
Viewers do not differentiate between reality shows and daily soap operas.
D.
A lot of money is spent in building sets and renting locations for reality shows.
E.
Reality shows need to improve the quality of material they provide.