The Diels-Alder reaction will not take place with which of the following reactants?

• A
  $CH_2=CH-CH_2-CH=CH_2$ and $CH_2=CH_2$
• B
  $CH_2=CH-CH=CH_2$ and $CH_2=CH_2$
• C
  $CH_2=CH-CH=CH_2$ and $CH_3-CH=CH_2$
• D
  $CH_2=CH-CH=CH_2$ and $CH_2=CH-CH_3$