A company that makes mobile applications surveyed every 10th customer to learn more about how often customers are using one of the company’s new apps. The table shows the results of the survey.
 Feedback Number
 use frequently 
 51
 use sparingly 
 23
 do not use 
 12
 What is the predicted percentage of customers who use the new app either frequently or sparingly?
 A. 
 59%
 B. 
 74%
 C. 
 85%
 D. 
 86%