Chris and His Family Have Developed a Successful Business Selling

Chris and his family have developed a successful business selling a liquid spray fertilizer to farmers. The fertilizer consists of rich, organic, composted material. Recently, Organic Seed, a national seed company, has been marketing a powdered chemical fertilizer to its customers; Organic's fertilizer is less expensive than Chris's product. Organic's efforts are an example of the ________ in Porter's model for industry analysis.

A) buyers' negotiating influence
B) rivalry among competitors
C) threats of substitute products and services
D) power of the suppliers
E) threats of new ideas