"Without, the night was cold and wet, but in the small parlor of Lakesnam Villa the blinds were drawn and the fire burned brightly.", an excerpt from the exposition in "The Monkey's Paw.", the one piece of information you can infer about the story from this sentence is: D. There is a fire burning to heat and light a house, so the story is likely set in the past.
B) It gives the stanza a positive, playful tone.
Then she tells him her plan: while Duncan sleeps, she will give his chamberlains wine to make them drunk, and then she and Macbeth can slip in and murder Duncan. They will smear the blood of Duncan on the sleeping chamberlains to cast the guilt upon them.