ANSWER
The correct choice is C.
EXPLANATION
The given data set can be rearranged as follows:
21,21,22,23,23,24,25,25,25,25,25,26,27
No. frequency
21.........2
22.........1
23........2
24........1
25........5
26........1
27........1
We can use dots to represent the frequencies.
This will produce the dot plot in option C.
