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 for a specific product and specific customer
B . The PriceRow with NO specific product but with specific customer
C . The PriceRow for a specific product group and customer group
D . The PriceRow with NO specific product or customer

Answer: A