The last one should be your answer.
I think it's D. I didnt learn this yet in English, but the most reasonable answer to me is D.
Personification is talking like compare things by human actions
What story is it from? If I know, then I can help. :)
Given the context and wording, I would say the iron weight is symbolizing a scale, or a like instrument used for weighing things such as potatoes or hay.
