Why the answer is A

Price $80 20 no 10,000 15,000 20,000 Quantity of tickets Refer to the graph above to answer this question. All of the statements below, except one are correct. Which is the exception? - Q A) Any price under $40 will result in all the tickets being sold regardless of which of the three demand curves is considered. ( B) If the price of a ticket is $20 and demand is Dj, then 5,000 people who would like to attend the game will not be able to unless they are able to buy a ticket from a scalper. O C) If the price of a ticket is $60 and demand is D,, then there is a shortage of 2,500 seats. * D) If the price of a ticket is $40 and demand is D3, then there will be 5,000 unsold tickets