Does Not Undergo the Diels-Alder Reaction as a Diene Because

does not undergo the Diels-Alder reaction as a diene because:

A) a ring system with isolated alkenes cannot function as the diene component.
B) it cannot adopt the s-cis conformation.
C) it lacks electron-withdrawing groups.
D) it lacks strong electron-releasing groups.
E) the two double bonds are farther apart than in a non-cyclic conjugated system.