Rectified spirit obtained by fermentation contains $4.5 \%$ of water. To remove this water,rectified spirit is mixed with a suitable quantity of benzene and heated. Benzene helps because:

• A
  It is a dehydrating agent and so removes water.
• B
  It forms the lower layer which retains all the water so that alcohol can be distilled off.
• C
  It forms an azeotropic mixture having a high boiling point and thus allows the alcohol to distill over.
• D
  It forms low-boiling azeotropic mixtures which distill over,leaving behind pure alcohol which can then be distilled.