Question
1. Which is a central idea of the section "United by
Technology" on p. 15?
@ Color TV sets became popular in the mid-1950s.
® Cable TV introduced hundreds of new shows.
© TV helped bring Americans together.
© Americans watched Neil Armstrong walk on
the moon in 1969.
Answer
The central idea of the section "United by Technology" on p. 15 is that TV helped bring Americans together.