The average low temperatures in January are given for a few cities. Arrange the cities in increasing order of their temperatures.
a. Barrow -19°F, Littlefork -9°F, Chicago 18°F, Topeka 20°F, Boston 22°F
b. Barrow -19°F, Littlefork -9°F, Topeka 20°F, Chicago 18°F, Boston 22°F
c. Barrow -19°F, Littlefork -9°F, Chicago 18°F, Boston 22°F, Topeka 20°F
d. Littlefork -9°F, Barrow -19°F, Topeka 20°F, Chicago 18°F, Boston 22°F
