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