An article from the American Journal of Public Health 2 reports the results from a randomized study designed to evaluate the efficacy of an intervention targeted to young African American men who had tested positive for a sexual transmitted infection (STI) at a large urban health clinic. A representative sample of 266 men was randomized to be in either the intervention group (n=141) or the control group (n=125). The primary outcome under study was reinfection, defined as testing positive for another STI during the 3-month follow-up period. At the end of the study, 45 of the 141 subjects in the intervention group were reinfected with a STI, as compared to 63 of the 125 subjects in the control group. 17. What is the estimated relative risk of STI reinfection for subjects in the Intervention group compared to subjects in the Control group?

a. 0.19

b. 0.63

c. 1.58

d. -0.19