Which of the following is the source of 20 consumer surplus

Last updated: 10/6/2023

Which of the following is the source of 20 consumer surplus O a A consumer goes to the store to purchase a 20 item but discovers that the item has sold out O b A consumer is willing to pay 100 for an item but manages to buy it for only 80 O c A store acquires 300 of stock but is only able to sell 280 of it O d A store has 300 of stock but could have sold 320 worth if it had been available