What did American writer John Keats mean when he wrote in The Crack in the Picture Window that ...

What did American writer John Keats mean when he wrote in The Crack in the Picture Window that Americans could purchase a box in a suburban development inhabited by people whose age, income, number of children, problems, habits,
 
  conversation, dress, possessions, and perhaps even blood type are also precisely like theirs? A) Suburban homes were made affordable because of standardized construction.
  B) Suburban living encouraged mindless conformity and a lack of diversity.
  C) Suburbanites usually lived in isolation from each other.
  D) Suburban living was limited to the upper class.