On the Midterm,Ms

Multiple Choice

On the midterm,Ms.Gomez' first-period class had a mean of 79.5 and a standard deviation of 5.Her third-period class had a mean of 81.7 and a standard deviation of 17.Given only this information,what inference can be made?

A) The first period is more difficult to teach than third period.
B) The midterm was probably too difficult for both classes.
C) The third period is more difficult to teach than first period.
D) The two classes seem to be fairly equal in abilities.