Businesses are more willing to sell a product when the price （）and less willing to sell it when prices （）。
Businesses are more willing to sell a product when the price （）and less willing to sell it when prices （）。
Businesses are more willing to sell a product when the price （）and less willing to sell it when prices （）。
A.rises / riseB.rises / fallC.falls / riseD.falls / rise正确答案：rises / fall