When a Frail 83-Year-Old Patient Whose Temperature Was 96

When a frail 83-year-old patient whose temperature was 96.8° F at 8:00 AM shows a temperature of 98.6° F at 4:00 PM, the nurse is:

A) pleased that the temperature has come up to normal.
B) satisfied that the patient is warm enough.
C) concerned about the evidence of fever.
D) relieved that the patient is improving.