Is very simple, although the term "chaser" may not be as commonly used as it was when John Collier wrote his story. A chaser is a drink that is taken to follow the first alcoholic drink.
Answer:
B. Is simply an extension of the title.
Explanation:
While a subtitle can inform the reader of the topic of the text or give more information about the title, its main purpose is to be an extension of the title.
I don't exactly get what you are saying, so I'm practically guessing. If you restate I will gladly help you.