A Patient Hospitalized with a Fever and Red,hot,painful Knees Is

A patient hospitalized with a fever and red,hot,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) had several knee injuries as a teenager.
B) recently returned from South America.
C) is sexually active with multiple partners.
D) has a parent who has rheumatoid arthritis.