Question ID:PT70 S4 Q7 Passage:If grain prices double then the average price of a loaf of bread will rise between 10 and 15 percent, whereas the price of grain-fed beef will come close to doubling.  Stem:Which one of the following would, if true, most contribute to an explanation of the phenomenon described above? Correct Answer Choice:CChoice A:Farmers engaged in very large-scale cattle production generally try to reduce the labor costs involved in the production and sale of beef. Choice B:The wholesale price per pound of beef is approximately ten times the wholesale price per pound of bread. Choice C:The labor and marketing costs in producing and selling bread represent most of its cost, but the cost of feeding cattle represents most of the cost of producing beef. Choice D:Only an insignificantly small proportion of the beef sold in retail markets is produced from cattle fed on grass rather than grain. Choice E:The vast majority of retail grocery outlets purchase the bread they sell from small independent bakers but purchase the meat they sell from large wholesale processing operations.