Which one of the following statements is true? a. Temperatures differing by 25° on the Fahrenheit scale must differ by 45° on the Celsius scale. b. 53 K corresponds to -53°C. c. Temperatures which differ by 20° on the Celsius scale must differ by 36° on the Fahrenheit scale. d. Water at 90° C is warmer than water at 210°F. e. 0°F corresponds to -32°C.