At Last Measurement,the Client's Vital Signs Were: Oral Temperature 98°F

At last measurement,the client's vital signs were: oral temperature 98°F (36.7°C) ,heart rate 76 beats/min,respiratory rate 16 breaths/min,and blood pressure (BP) 118/60 mm Hg.Four hours later,the vital signs were: oral temperature 103.2°F (38.5°C) ,heart rate 76 beats/min,respiratory rate 14 breaths/min,and blood pressure 120/66 mm Hg.Which should be the nurse's first intervention at this time?

A) Ask the client whether he has had a warm drink in the last 30 minutes.
B) Notify the primary care provider of the client's temperature.
C) Ask the client whether he is feeling chilled.
D) Take the temperature by a different route.