I believe that it is "C. Minor supporting detail" But I still have some doubts, so it may be "B. Major supporting detail"
Answer:
Explanation:
The subtle use of language in "I have come after them and made repair" (line 6) indicates that this is a regular occurrence. The hunters have destroyed sections of the stone wall in the selfish pursuit of their prey and apparently without concern for the landowners, who must work to repair the wall each spring.