he test scores of the students in four classes are summarized below. Answer the questions about them.
Class A: The mean score is 123 and the range of scores is 26.
Class B: The mean score is 115 and the range of scores is 32.
Class C: The mean score is 114 and the range of scores is 28.
Class D: The mean score is 120 and the range of scores is 34.

(a) Based on the information above, which class has the lowest scores on average?

Class A

Class B

Class C

Class D

(b) Based on the information above, which class's scores have the most variability?

Class A

Class B

Class C

Class D