At a certain university, library study rooms have a maximum time limit of 3 hours per student. A librarian takes a random sample of times that 37 students use the study rooms and found that the mean time was 2.7 hours with a standard deviation of 0.2 hours. Which of the following is the best description of the amount of time that students used the study rooms? 
选项为:A:The distribution has a median that is less than the mean.  B:The distribution of times is approximately normal since the standard deviation is approximately 95\% smaller than the mean.  C:The distribution of times is approximately normal since the sample size is greater than 30, and thus the Central Limit Theorem applies.  D:The distribution of times is skewed to the right because the maximum possible time is within two standard deviations of the mean.  E:The distribution of times is skewed to the left because the maximum possible time is within two standard deviations of the mean.  请回答其中一个选项.