The irony shows that although the Monster is depicted as a monster, it is actually Victor who is the true monster due to everything he has done and the way that he dealt with consequences. The monster is described so as to instill fear, but is not really monstrous in its behavior.
The answer is: [C]: "the poet's sorrow and despair" .
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Refer to the entire poem:
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"The Guitar" by Federico Garcia Lorca
The weeping of the guitar
<span> begins.
The goblets of dawn are
smashed.
The weeping of the guitar
begins.
Useless
to silence it.
Impossible
to silence it.
It weeps
monotonously
as water weeps
as the wind weeps
over snowfields.
Impossible
to silence it.
It weeps for distant
things.
Hot southern sands
yearning for white camellias.
Weeps arrow without target
evening without morning
and the first dead bird
on the branch.
Oh, guitar!
Heart mortally wounded
by five swords.
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</span>
Krogtad it is it’s off edge