The critical height in the stability of soil is the

- 1
  
  minimum height at which it is possible for the sloped bank of soil to be stable
- 2
  
  maximum height at which it is possible for the sloped bank of soil to be stable
- 3
  
  minimum vertical height of the soil is an open excavation
- 4
  
  maximum vertical height of the soil is an open excavation.

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