The Table Below Shows Hypothetical Per-Minute Cell Phone Charges for "Pay-And-Talk

Multiple Choice

The table below shows hypothetical per-minute cell phone charges for "pay-and-talk" service over several years.
TABLE 2-2
-Refer to Table 2-2.Assume that 2008 is used as the base year,with the index number = 100.Which of the following series is the correct set of index numbers for the per-minute cell phone charges from 2008 to 2012?

A) 0.55; 0.50; 0.40; 0.35; 0.25
B) 100; 91; 73; 64; 45
C) 55; 50; 40; 35; 25
D) 1.0; 0.91; 0.73; 0.64; 0.45
E) 100%; 91%; 73%; 64%; 45%