Since the poem describes a situation happening in the kitchen, it resembles a note left in there:
I have eaten
the plums
that were in
the icebox
and which
you were probably
saving
for breakfast
Forgive me
they were delicious
so sweet
and so cold
The poem might not have a proper rhythmic or iambic structure, but it doesn't lack emotion or description since the author conveys them with a simple language. The correct answer is B.