Even before the pandemic, brick-and-mortar stores have been closing in the U.S. People often contribute this to the rise of internet and e-commerce such as Amazon. Rex talked about some other factors that make malls and brick-and-mortar stores struggle. Which of the following is NOT a factor? a. Big-box stores. b. Income inequality Oc Costs to rent retail space. d. Shift of consumer spending from things to services