Which of the following examples describes macroeconomics? A. The U.S.unemployment rate has increased by 0.4 percent. B. Alice Munro won the Nobel-Prize in Literature in 2013. C. Thanksgiving is celebrated on the third Thursday of November every year. D. Walmart has lowered the price of iPhones before the launch of the new iPhone 5S.

The correct answer is A. The U.S. unemployment rate has increased by 0.4 percent.<br /><br />Macroeconomics is the branch of economics that deals with the performance, structure, behavior, and decision-making of an economy as a whole, including regional, national, and global economies. It includes the study of aggregate indicators such as GDP, unemployment rates, and price indices.<br /><br />Option A describes a macroeconomic issue because it pertains to the overall unemployment rate in the U.S., which is a key indicator of the economy's health.<br /><br />Option B is related to literature and does not pertain to economics.<br /><br />Option C is a fact about a holiday and is not related to economics.<br /><br />Option D is related to a specific company's pricing strategy and is more related to microeconomics, which focuses on individual firms and consumers.