The table below shows the temperature, in degrees Fahrenheit, in Boston, Massachusetts, over a 10-hour interval
 Time
 A
 B
 C
 D
 1 am to 5 a.m.
 5 a.m. to 7 a.m.
 7 am to 10 a.m.
 1am.
 10 am to 11 a.m.
 29° F
 5am
 Temperature (Fahrenheit)
 Over which interval does the temperature have the greatest average rate of change?
 20° F
 7 am
 18 F
 10 a.m.
 25° F
 11am.
 28 F