The clinic nurse is performing a psychosocial assessment of a client who has been told that she is pregnant. Which assessment finding indicates to the nurse that the client is at risk for contracting human immunodeficiency virus (HIV)?

A) A client who has a history of intravenous drug use
B) A client who has a significant other who is heterosexual
C) A client who has a history of sexually transmitted infections
D) A client who has had one sexual partner for the past 10 years