When the following cyclopentadiene-fused annulene is treated with KH, a green solution of a stable cyclopentadiene anion results. What is the likely reason for the green coloration?
A) Formation of a highly reactive radical species.
B) Oxidation of the cyclopentadiene anion.
C) Presence of conjugated pi-electron systems.
D) Formation of a non-aromatic compound.
