The Following Patients Call the Outpatient Clinic

The following patients call the outpatient clinic. Which phone call should the nurse return first?

A) A 44-yr-old patient who has bloody discharge after a hysteroscopy earlier today
B) A 64-yr-old patient who is experiencing shoulder pain after a laparoscopy yesterday
C) A 34-yr-old patient who is short of breath after having a pelvic CT with contrast dye
D) A 54-yr-old patient who has severe breast tenderness following a needle aspiration breast biopsy