Select the Best Way of Analysing Qualitative User Comments Collected

Select the best way of analysing qualitative user comments collected during a user tset

A) classify the comments into categories and count number of comments in each category
B) find the average and the standard deviation of the data and report it in the body of the report
C) use a scatterplot to graph users on the x axis and comments on the y axis.
D) look for critical incidents to report.