Define The owner of a sandwich shop surveyed her customers on how often they came in, which sandwiches they preferred, and what quantity of sandwiches they ordered . She then added up the quantities demanded by all her consumers at each price. What did she create? A. demand for sandwiches B. a market demand schedule C. the substitution effect D. an individual demand schedule

The correct answer is B. a market demand schedule.<br /><br />The owner of the sandwich shop surveyed her customers on their preferences and the quantity of sandwiches they ordered at each price. By adding up the quantities demanded by all her consumers at each price, she created a market demand schedule. A market demand schedule shows the total quantity of a good that all consumers in a market are willing and able to purchase at each price level. It represents the overall demand for a product in a market, as opposed to an individual demand schedule, which shows the demand for a product by a single consumer.