Adentist office gives a survey to all wisdom teeth extraction patients asking them to rate the quality of their dental experience. one month after wisdom teeth extraction, the dentist contacts the patients again to ask if there were any complications from the extraction. last year, the results of the surveys showed that of the patients who had a poor dental experience, 37% had post-extraction complications. what conclusion can be drawn from this study?

a. poor dental experiences cause post-extraction complications.
b. post-extraction complications cause poor dental experiences.
c. some patients who have a poor dental experience also have post-extraction complications.
d. most patients who have a poor dental experience also have post-extraction complications.