Nurse Beyonce Is Caring for a 20 Lbs, 6 Month-Old

Nurse Beyonce is caring for a 20 lbs, 6 month-old with a 3 day history of loose watery stool, vomiting and fever. Peripheral intravenous therapy has been initiated, with 5% dextrose in 0.33% normal saline with 20 mEq of potassium per liter infusing at 40 ml/hr. Which finding should be reported to the health care provider immediately?

A) 3 episodes of vomiting within a period of an hour
B) crying and irritability
C) sucking on a pacifier too vigorously
D) anuria within the past 4 hours