Paragraph 3 indicates that all of the following are true of "natural areas" as conceived by Park and Burgess EXCEPT: A. Use of the land in natural areas follows a consistent pattern but is generally unplanned. B. People living in natural areas tend to have much in common. C. Natural areas are usually protected from ""invasion"" by people in other areas. D. Natural areas are an important basic component of the model Park and Burgess developed.