When Serena Williams, Cindy Crawford, Hillary Clinton, Katy Couric, Jennifer Lopez, and Ashanti all start wearing Wal-Mart jeans at public appearances, economists would explain any resultant raise in Wal-Mart’s jean sales to the change in: (1) Expectations regarding prices and availability. (2) Numbers and ages of the buyers. (3) Prices of the related goods. (4) tastes and preferences.
Find out the right answer from the above options.