Answer: B) Irony.
Explanation: an irony is a phrase or group of words that expresses the opposite of its literal definition, it is often use to make a critique about a delicate topic, or to introduce an humorous element in a text. In this case, when the general claims that he has "one rather promising prospect”, referring to go hunting the next day, it is an example of an irony, because even though he said that, he is clearly not happy or excited to go hunting.
