Answer:
A. Quiet knocking; barely there
Explanation:
At the end of "The Monkey's Paw" we are introduced to the excerpt "... and at the same moment a knock, so quiet and stealthy as to be scarcely audible, sounded on the front door" which shows that the letter "A" is the correct answer to your question.
"The Monkey's Paw" tells the story of a magical monkey paw that will end up in the hands of the White family. The former owner of the paw says that the object fulfills three wishes, but it is very dangerous, because it always asks for a price to fulfill the wish and the price is always terrible. The Whites, do not care about the warning and ask for 200 pounds, which are granted to the family, after their son is pleaded to death during work and the factory pays this amount as compensation to the family.
Desolate, the Whites ask the monkey's paw to return their son's life and are sparse and fearful when they hear faint and almost inaudible knocks on the front door of the house.
