Answer: Option B
Explanation: The branch of economics that studies the economy as a whole is called macroeconomics. Macroeconomics tries to understand and inter- relate the factors that affect the whole economy and not just a particular sector or community.
The area of concern in macroeconomics are inflation or deflation rate, interest rate, unemployment etc.
Thus, from the above we can conclude that the unemployment and general price level since 1990 is related to macroeconomics.