Microeconomics is the study of

The impact of the price of oil on all prices in the economy. A: Microeconomics B: Macroeconomics

In microeconomics, the short term usually means a week or a month, and the long term means a year or more.

Below is a student's answer to the question "What is microeconomics?" If you were the instructor, how would you correct the student's answer?

The ratio between a country’s imports and exports of goods or services to their gross domestic product (GDP) is a measure of that country’s:（ ） A: microeconomics B: openness as an economy C: macroeconomics D: economic interdependence