Which of the Following Does Macroeconomics Endeavor to Answer

Which of the following does macroeconomics endeavor to answer?
i. Why is the typical person in the United States today more than ten times richer than the typical person a century ago?
ii. Why has the unemployment rate been nearly twice as high in Europe as in the United States in recent years?
iii. What determines the rate of inflation? What determines how rapidly the overall price level in an economy increases?

A) i only
B) i, ii, and iii
C) ii only
D) i and ii
E) ii and iii