Consider the following statements about organic farming:
$I.$ Organic farming promotes the use of crop rotations and cover crops and encourages balanced host/predator relationships.
$II.$ Integrated pest and weed management and soil conservation systems are valuable tools on an organic farm.
$III.$ Organic farming protects the environment,minimizes soil degradation and erosion,and decreases pollution.
Which of the statements given above are correct?

• A
  $I, II$ and $III$
• B
  $I$ and $II$
• C
  $I$ and $III$
• D
  $II$ and $III$