The article states: "Talkies" were introduced in the 1920s. These were
movies that added sound. About 10 years later,
"Technicolor" arrived. It wowed audiences with rainbow
colors in films like The Wizard of Oz. The 1950s brought
3D movies. Special glasses made the action seem to
jump off the screen.
The author uses this passage mostly to
A. tell why people like movies
B. show how movies have changed
C. show how movies are made
D. tell about the five senses in movies