Answer:
B). “[The niece] rattles on cheerfully about the shooting and the scarcity of birds, and the prospects for duck in the winter.”
Step-by-step explanation:
The quote from the short story “The Open Window” by Hector Hugh Munro or Saki(pseudonym) that marks a suspenseful and humorous point in the story is displayed in option B as mentioned above. Rattling 'cheerfully about shooting' adds a humorous tone while the scarcity of birds and prospects for duck proposes a suspenseful and serious dimension to the plot that keeps the interest of the readers intact until the end. Thus, option B is the correct answer.