The quote that best support the answer to Part A include the following: C. “if the old feud broke loose again”
In English literature, a context clue can be defined as the hints in a literary work, which provides the meaning of an unfamiliar word, phrase or sentence, that is literally hidden in plain sight by an author (writer).
Generally speaking, the word "enmity" connotes hatred. In this context, we can reasonably infer and logically deduce that the quote in "The Pardon of Becky Day" that best supports the use of the word "enmity" would be “if the old feud broke loose again” because indicates the potential resurgence of an old feud between the two men who led the factions.