The correct answer is A. Free verse
Explanation:
Free verse means the verses are not limited by the metric, which is the number of syllables in each line and whether these syllables are stressed or unstressed syllables, neither free verse have rhyme which refers to similar sounds that are repeated in different verses or any musical pattern, in the poem "This is just to say" by William Carlos William from which the excerpt "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" belongs, free verse is the structures used as there is not any specific rhythm, number of syllables, a combination of syllables or specific poetic pattern and thus the structure of this poet is A. Free verse.
