Answer: C. the ratings that the golfers give Callaway clubs.
Step-by-step explanation: Qualitative data, unlike quantitative data, does not deals with the values that results from measurement or counting a number of values. Hence, options A, B and D will not be in the queue as three of them deals with with the numbers. But, option C gives the rating of the Callaway clubs by the golfers, that is, bad, average, good, very good and excellent, etc. , so This option is correct.
Therefore, C is the correct option.