Much of macroeconomics attempts to explain a. changes in the growth rate of state government spending. b. changes in the prices and quantities of individual goods and services. c. long-run growth and short-run fluctuations in real GDP. d. changes in the price of oil and gasoline.

C) long-run growth and short-run fluctuations in real GDP

Explanation:

Macroeconomics is a strand of economic science that discusses large economic aggregates, such as income, inflation, and employment variations. It is an approach that aims to discuss these factors and bring about improvements through economic policies. The concerns of the macroeconomy are mainly to maintain a stabilized economic system, with sustainable growth of GDP, income and social and economic indicators.