When the price of used cds is $4, Daphne buys five per month. When the price is $3, she buys nine per month. Daphne's demand for used cds is a. Inelastic, and her demand curve would be relatively flat. b. Elastic, and her demand curve would be relatively steep. O c. Inelastic, and her demand curve would be relatively steep. d. Elastic, and her demand curve would be relatively flat. Fir When MU is zero, Total Utility is: Se Ser a. Zero O b. Negative O c. Increases O d. Maximum