The servants do not "abscond" because Montresor tells them to stay at home; they do so because he tells them he will be gone all night. They don't care if he finds out that they all left to join in the carnival. He can't fire them because he can't get anybody to replace them.
Answer:
make abgles a snowmann oh i eat it play freeze tag oh and thow iit at hous no om jp
The answer was actually D.
D.) It creates tension by moving from the slower pace of the description to the faster pace of Bob's dialogue, which suggests an uneasiness on Bob's part.