A Teacher Reports That the Class Scores Are Generally Distributed

A teacher reports that the class scores are generally distributed according to a bell curve.This means:

A) the mean,median,and mode have different values
B) the left half and the right half are not symmetrical
C) approximately 95% of the scores fall between -1 and +1 standard deviation from the mean
D) 100% of the scores fall between -3 and +3 standard deviations from the mean