Which Patient Is Most at Risk for the Infection of Epididymitis

Which patient is most at risk for the infection of epididymitis?

A) 17-year-old athlete who trains for several hours a day
B) 22-year-old who has been exposed to mumps
C) 45-year-old who was circumcised at the age of 10
D) 50-year-old who has smoked for 30 years