The Pressure in an Air Storage Tank Is Measured to Be

The pressure in an air storage tank is measured to be 250 kPa (gage) in the morning, and 275 kPa (gage) in the afternoon as a result of solar heating. The local atmospheric pressure is 100 kPa. If the temperature of air in the tank is 15°C in the morning, the air temperature in the afternoon is

A) 15.9°C
B) 31.5°C
C) 38.0°C
D) 16.2°C
E) 15°C