A coffee shop owner would like to create a blend of cinnamon and hazelnut flavored Effee that sells for $8.00 a pound. Currently, the cinnamon coffee sells for $6.00 per pound and the hazelnut coffee sells for $9.00 per pound. Which of the following systems of equations could be used to determine the amount c, in pounds, of the cinnamon flavored coffee, and the amount h. in pounds, of the hazelnut flavored coffee that should be mixed to obtain 20 pounds of the desired blend?