A Patient Has Been Diagnosed with a Sexually Transmitted Disease

A patient has been diagnosed with a sexually transmitted disease (STD) and the patient's partner is angry, saying, "She must have cheated on me." What response by the nurse is most appropriate?

A) "This infection may have been present for a long time."
B) "You need to be tested for this disease too."
C) "Yes, you're right; if you don't have the STD, she cheated."
D) "Now, now, getting angry will not help anything."