While Working at a Summer Camp, the Nurse Notices a Circular

While working at a summer camp, the nurse notices a circular lesion with a red border and clear centre on the arm of a client who is in the camp clinic complaining of chills and muscle aches. Which of the following actions should the nurse take next?

A) Palpate the abdomen.
B) Auscultate the heart sounds.
C) Ask the client about recent outdoor activities.
D) Question the client about immunization history.