The lengths of adults of a certain species of snake are normally distributed with mean 40 cm and standard deviation 3.3166 cm. A sample of ten such snakes are obtained and measured. What is the probability that the mean of this sample will fall between 39 and 41 cm.? If you use R, choose have same two digits answer.

(A) 0.3156 (B) 0.5573 (C) 0.6578 (D) 0.9344 (E) 0.3987