Debit cards are safer than credit cards because debit cards generally require a PIN number

What happens when consumers in the economy start to spend less, perhaps because they become worried about the future?

A. Savings rises, causing increases in investment that boost GDP. B. The demand for dollars falls, causing the exchange rate to fall and exports to rise. C. Prices fall, causing consumers to start spending again. D. The incomes of other people fall, causing those people to spend less as well.

Macroeconomic issues include all of the following EXCEPT:

A. recessions and expansions. B. productivity. C. energy reserves. D. economic growth.