The following is the data for the height (in cm) of people in a certain range: 110, 115, 98, 88, 121, 116, 130, 105, 111, 112, 123, 118, 106, 99, 100, 89, 125, 108. What is the range of the data?
a) 40 cm
b) 45 cm
c) 50 cm
d) 55 cm