Final answer:
An increase in the price of raw tuna, a decrease in the price of wasabi, and a decrease in the price of sushi would not increase demand for sushi, a normal good.
Step-by-step explanation:
A normal good is one for which demand increases when income rises. In this case, an increase in consumers' income would increase the demand for sushi. However, the options that would not increase demand for sushi are:
- An increase in the price of raw tuna: If the price of a substitute for sushi, such as raw tuna, increases, consumers may choose to buy less sushi and opt for the substitute instead.
- A decrease in the price of wasabi: Wasabi is a complementary good for sushi, meaning that it is typically consumed together with sushi. If the price of wasabi decreases, it may not necessarily lead to an increase in sushi demand.
- A decrease in the price of sushi: While a decrease in the price of sushi may make it more affordable, it does not necessarily increase demand.