Tom and his family have developed a successful business selling a liquid spray fertilizer to farmers. the fertilizer consists of rich, organic, composted material. recently nubreed seed, a national seed company, has been marketing a powdered chemical fertilizer to its customers; nubreed's fertilizer is less expensive than tom's product. nubreed's efforts are an example of the in porter's model for industry analysis. rev: 03_23_2016_qc_cs-46415 multiple choica. threats of substitute products and servicesb. threats of new ideasc. power of the suppliersd. competitive rivalry among competitorse. buyers' negotiating influence