Which of the following statements about price elasticity of demand (PED) are correct? (A) If demand is perfectly elastic, the price elasticity coefficient is infinite. (B) When demand is inelastic, the percentage change in quantity demanded is greater than the percentage change in price. (C) The total expenditure method calculates the price elasticity of demand by analyzing changes in the total amount spent on a good at different prices. (D) A demand curve that is steep indicates a more elastic demand.