A 22-Year-Old Patient Hospitalized with a Fever and Red, Hot

A 22-year-old patient hospitalized with a fever and red, hot, and painful knees is suspected of having septic arthritis. Information obtained during the nursing history that indicates a risk factor for septic arthritis is that the patient

A) has a parent who has reactive arthritis.
B) is sexually active and has multiple partners.
C) recently returned from a trip to South America.
D) had several sports-related knee injuries as a teenager.