Consider the following statements:
$I$. Solid stem in wheat exhibits non-preference by stem sawfly.
$II$. In cotton,smooth leaf and absence of nectar repel bollworms.
$III$. In maize,high aspartic acid,low nitrogen and sugar content protect them from stem borers.
Which of the statements given above are correct?

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