Many proponents of sustainability believe that encouraging local self-sufficiency is important for ...

Many proponents of sustainability believe that encouraging local self-sufficiency is important for building sustainable societies because ________.
 
  A) more and more people are growing gardens
  B) when people are tied more closely to the area where they live, they will value the area more and seek to sustain its environment and its human communities
  C) this is not correct; proponents of sustainability believe that encouraging local self-sufficiency will pose a threat to building sustainable societies
  D) it forces citizens to look more closely at the global community
  E) it eliminates governmental influence on local practices