The correct answer is A. The source of the hunting-cries
Step-by-step explanation:
In a story, the antagonist is the person, animal, creature or force that is opposite to the main characters and stops them from achieving a certain goal or just represents a conflict. In the case of the excerpt presented, Bill and Henry represent the main characters and in this case the opposing force or antagonist is "the source of the hunting-cries" because the main characters are trying to escape from this and this seems to represent an evil creature or force that creates conflict and they want to avoid as expressed in "I wisht they'd strike game somewheres, an' go away an' leave us alone".