The Table Below Shows Hypothetical Per- Minute Cell Phone Charges

The table below shows hypothetical per- minute cell phone charges for "pay- and- talk" service over several years. $$\begin{array} { | l | l | } \hline 2008 & 0.55 \\\hline 2009 & 0.50 \\\hline 2010 & 0.40 \\\hline 2011 & 0.35 \\\hline 2012 & 0.25 \\\hline\end{array}$$ TABLE 2- 2
-Let 1 stand for "any given period" and 2 stand for "base period." The formula of any index number can be written as: A) value of index at $1 = \frac { \text { relative value at } 1 } { \text {relative value at } 2} \times 100$


B) value of index at $1 = \frac { \text { absolute value at } 1 } { \text { absolute value at } 2}$


C) value of index at $1 = \frac { \text { relative value at } 1 } { \text { relative value at } 2}$

D) value of index at $1 = \frac { \text { absolute value at } 1 } { \text {absolute value at } 2} \times 100$

E) value of index at $1 = \frac { \text { absolute value at } 2 } { \text {absolute value at } 1} \times 100$