Which client's statements reflect the correct understanding of genital warts and the human papillomavirus (HPV)?
A. Genital warts are caused by bacteria, so I don't need to worry about HPV.
B. HPV is not sexually transmitted, so I can't get genital warts.
C. Genital warts are caused by HPV, which is a sexually transmitted infection.
D. I don't need to get vaccinated against HPV because genital warts are harmless.