Interindustry Competition Refers to the Fact That

Interindustry competition refers to the fact that

A) oligopolistic producers establish a common price for their products.
B) products are identical in a purely competitive industry.
C) firms that sell a product at one stage of production buy materials and parts from other firms at prior stages of production.
D) in some markets, the producers of a certain commodity might face competition from products of other industries.