On a certain fall day in Anchorage, Alaska, the temperature at 1:00 a. m. was −1.6°C. At 1:00 p. m. (12 hours later), the temperature had risen to 3.2°C. On average, how much did the temperature change, in degrees, each hour from 1:00 a. m. to 1:00 p. m.? A. −1.6° per hour B. −0.4° per hour C. 0.4° per hour D.1.6° per hour