Assume an Economy That Is Producing Only One Product

Multiple Choice

$$\begin{array} { | c | c | c | } \hline \text { Year } & \text { Units of Output } & \text { Price Per Unit } \\\hline 1 & 20 & \$ 4 \\\hline 2 & 25 & 4 \\\hline 3 & 30 & 6 \\\hline\end{array}$$ Assume an economy that is producing only one product. Output and price data for a three-year period are shown in the table. If year 2 is chosen as the base year, the price index for year 1 is

A) 80.
B) 100.
C) 120.
D) 20.