Which story is most likely an example of an allegory?
A. Two men, struggling with crippling debt, rob a bank and are forced
to take several hostages after the robbery goes horribly wrong.
B. A single mother goes to school at night and eventually gets a
college degree so she can provide a better life for her children.
C. A lonely angel falls from the sky and learns to fly again only after
he performs miracles that help to keep a poor couple's farm
afloat.
D. A small dog, accidentally lost during a family move, struggles to
overcome several obstacles as he finds his way back home.