Answer:
D. there is not enough information to determine the change in the overall price level.
Step-by-step explanation:
A price level is the average of current prices across the entire spectrum of goods and services produced in the economy. To determine the price level, information about current and past period's prices of a basket of goods and services is needed to be compared.
It is only the availability of two or more sets of such information that will enable a comparison to be made and for conclusions to be drawn.