An Obese Patient, Who Is Five Days Post-Abdominal Surgery, Rings

An obese patient, who is five days post-abdominal surgery, rings the call bell to tell the nurse that she has 'felt something give' in her abdomen after straining to open her bowels. The nurse's priority is to:

A) check the patient's vital signs.
B) put patient in bed with knees bent.
C) reassure her that it is quite normal.
D) contact the unit manager.