A company claims that the average delivery time for its packages is $48$ hours with a standard deviation of $4$ hours. If a random sample of $32$ deliveries is selected, what is the probability that the sample mean delivery time is more than $47$ hours?

• A. $0.8163$
• B. $0.8934$
• C. $0.9082$
• D. $0.9213$

Answer: (D)