A Manufacturer May Charge Different Prices in Different Markets for the Same

A manufacturer may charge different prices in different markets for the same product. Which reason is not a valid reason for differential pricing?

A) To meet the needs of target consumers who have a limited purchasing power.
B) To reduce the risk of gray markets.
C) To respond to differences in wholesale prices in different markets.
D) To react to changes in the exchange rate in countries where the products are sold.