Answer:
C. The demand for the Prius had decreased, and the supply of the Prius had increased
Explanation:
Toyota reducing its average retail price for 2010 is as a result of a decrease in the demand for the Prius in year 2009 and increase in the supply. In other for Toyota to make more sales, it has to reduce the price in other for the goods to get more customer demand.
Hence the best answer is C. The demand for the Prius had decreased, and the supply of the Prius had increased