What is the situational irony in the story “Federigo’s Falcon” by Giovanni Boccaccio?

A.
Monna marries Federigo in the end, although she is not in love with him.
B.
Monna’s son has a terminal illness, so the falcon can't save him.
C.
The only time Monna asks Federigo for something, he can't give it to her.
D.
Federigo’s falcon dies a pointless death.