A new screening test for Lyme disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% and 70%, respectively. Three hundred people are screened at a clinic during the first year the new test is implemented. (Assume the true prevalence of Lyme disease among clinic attendees is 10%.) Calculate the following values:The predictive value of a positive test is:        
A. 33.0%       
B. 18.2%      
C. 94.0%       
D. 22.2%       
E. 6.0%