At some music concerts we observe long lineups for tickets, and some unsatisfied customers who cannot get tickets. One explanation for this observation is that Select one: O A. CD prices have increased. O B. concert goers are not rational. O C. the market price for concert tickets is above its equilibrium price. O D. the market price for concert tickets is at its equilibrium value, but concert goers line up for tickets out of habit. O E. the market price for concert tickets is below its equilibrium price