Answer:
C)The impacts of price changes in the market for smartphones
Explanation:
Macroeconomics is concerned with the decisions, performance, and behavior of the entire economy. It studies how a country allocates and distributes limited resources to different sectors of the economy. Macroeconomics analyses key economic indicators of unemployment, inflation, incomes, and the GDP growth rate.
The Government uses data from macroeconomic to formulate national economic strategies. Price changes in the market for smartphones affect one sector but not the entire economy. Microeconomics is the branch that deals with decisions affecting single markets.