Final answer:
The poem "Trainor, the Druggist" was written by William Carlos Williams, a prominent modernist poet known for infusing his medical background into his literary works.
Therefore, the correct answer is: a) Edgar Lee Masters
Step-by-step explanation:
"Trainor, the Druggist" is a poem written by Edgar Lee Masters, who is not one of the options provided in the question. However, considering the given options, William Carlos Williams is the correct answer.
Williams was a modernist poet known for his vivid imagery and experimentation with verse, often drawing on his experiences as a doctor to depict the complexities of American life in his poetry.
Despite being contemporaries, T.S. Eliot and Robert Frost, the other authors mentioned, did not write "Trainor, the Druggist." Williams is celebrated for his influence on poetry with notable works like "The Red Wheelbarrow" and his five-part epic, Paterson.