Which of the Following Headlines Is More Closely Related to What

Which of the following headlines is more closely related to what microeconomists study than to what macroeconomists study?

A) Unemployment rate falls from 7.5 percent to 7.3 percent.
B) Real GDP falls by 0.4 percent in the third quarter.
C) Inflation was 2.4 percent last year.
D) The price of gasoline rises due to rising oil prices.