4. If a firm can sell 3,000 units of product A at $10 per unit and 5,000 at $8, then A. the price elasticity of demand is 0.44. B. A is a complementary good. C. the price elasticity of demand is 2.25. D. A is an inferior good. 5. Suppose Aiyanna's Pizzeria currently faces a linear demand curve and is charging a very high price per pizza and doing very little business. Aiyanna now decides to lower pizza prices by 5 percent per week for an indefinite period of time. We can expect that each successive week, A. demand will become more price elastic. B. price elasticity of demand will not change as price is lowered. C. demand will become less price elastic. D. the elasticity of supply will increase.