Which Man Would Be Most at Risk for Testicular Cancer

Which man would be most at risk for testicular cancer?

A) Austin, age 25, who is White, drinks lots of milk, and uses marijuana daily
B) Jarod, age 44, who is Black, 6'4", and uses marijuana about once a month
C) Simon, age 15, who is Latino, 5'2", and has a second cousin who had testicular cancer
D) Gene, age 71, who is White, lactose intolerant, and smokes cigars