In SAP Commerce, if multiple PriceRows match a price request, which PriceRow has priority?

In SAP Commerce, if multiple PriceRows match a price request, which PriceRow has priority?
A . The PriceRow with NO specific product or customer
B . The PriceRow for a specific product group and customer group
C . The PriceRow with NO specific product but with specific customer
D . The PriceRow for a specific product and specific customer

Answer: D