Answer:
With incomes falling in the recession, people are buying more chicken. - this statement is about inferior goods
II People are buying more beef now that incomes have increased. - this statement is about normal good
III People are buying more chicken because the price of chicken has fallen. This statment is about neither
IV With higher incomes people are switching from chicken to beef. - this statement is about both normal and inferior goods
Explanation:
A normal good is a good whose demand rises when income increases and falls when income falls. In this question, beef is a normal good.
An inferior good is a good whose demand rises when income fall and falls when income rises. Chicken is an inferior good in this example.