What Factors Contribute to the Stability of the Following Structure $\pi$

What factors contribute to the stability of the following structure?

A) structure has a 6 $\pi$ electron aromatic system
B) stabilized by conjugation between C=C and C=O
C) C=C is generally more stable than C=O
D) structure has intramolecular hydrogen bonding
E) More than one of the above are true.