In the reaction $CH_2=CH_2$ $\xrightarrow{HOCl} M$ $\xrightarrow{R} HO-CH_2-CH_2-OH$,where $M$ is a molecule and $R$ is a reagent,$M$ and $R$ are:

• A
  $CH_3-CH_2-Cl$ and $NaOH$
• B
  $Cl-CH_2-CH_2-OH$ and $aq. NaHCO_3$
• C
  $CH_3-CH_2-OH$ and $HCl$
• D
  $CH_2=CH_2$ and heat