The Country of Old Jersey Produces Milk and Butter,and It

Multiple Choice

The country of Old Jersey produces milk and butter,and it has published the following macroeconomic data,where quantities are in gallons and prices are dollars per gallon:
$$\begin{array} { l c c c c } & 2000 & & { 2001 } \\\hline \text { Good } & \text { Quantity } & \text { Price } & \text { Quantity } & \text { Price } \\\hline \text { Milk } & 500 & \$ 2 & 900 & \$ 3 \\\text { Butter } & 2000 & \$ 1 & 3000 & \$ 2 \\\hline\end{array}$$
Between 2000 and 2001,real GDP grew by how much,using a variable-weight price index?

A) 37.5%
B) 60.05%
C) 83.3%
D) 190.0%