The Table Below Shows Hypothetical Monthly Cell Phone Plan Fees

Multiple Choice

The table below shows hypothetical monthly cell phone plan fees for the identical service over several years. TABLE 2-2 Refer to Table 2-2.Assume that 2015 is used as the base year,with the index number = 100.The value of the index number in 2018 is calculated as follows:

A) (35/100) × 100 = 35.
B) 35/55 = 0.64.
C) 55/35 = 1.57.
D) (35/55) × 100 = 63.64.
E) (55/35) × 100 = 157.14.