The World Health Organization has started a number of programmes to prevent the spreading of $HIV$ infection.
Few such steps include:
$I.$ Ensuring the use of disposable needles and syringes.
$II.$ Free distribution of condoms.
$III.$ Advocating safe sex.
$IV.$ Controlling drug abuse.
Which of the steps given above are correct?

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