3.) The primary reason economists invoke the six assumptions of the perfect price com petition model is because: A. To turn scatter diagrams into continuous graphs with one market price B. To illustrate the impossibility of monopoly in the free market C. To turn the 'law of dema nd' into the 'law of supply' D. To illustrate the possibility of monopoly in a free market E. To turn the 'law of demand' into the 'law of supply