Assume an Economy That Is Producing Only One Product Refer to the Data

Multiple Choice

Assume an economy that is producing only one product.Output and price data for a three-year period are as follows.Answer the question on the basis of these data. $\begin{array}{c}\begin{array}{c}\\\underline{\text { Year }} \\1 \\2 \\3\end{array}\begin{array}{c}\text { Units of}\\\underline{\text {Output}}\\20\\25\\30\end{array}\begin{array}{c}\text {Price Per}\\\underline{\text {Unit}}\\ \$ 4 \\4\\6 \end{array}\end{array}$
Refer to the data.If year 2 is chosen as the base year,in years 1 and 3 the price index values,respectively,are:

A) 4 and 6.
B) 6 and 4.
C) 120 and 100.
D) 100 and 150.