Which of the following is NOT the purpose of America’s central bank?

America’s Central Bank is part of a larger financial system called the United States Federal Reserve System. It is not a single bank, but a banking system with operations that are both public and private. Its purpose is to control the flow of money in the economy, to supervise banking activity and to protect the financial system.

A study done in Greece says people can live longer and healthier lives if they eat what is known as the Mediterranean diet. Such a diet generally gets about 40 percent of its calories from olive oil and other fats that are considered healthy. Researchers from the University of Athens and Harvard University Medical School in Boston, Massachusetts did the study. They published the results in the New England Journal of Medicine. Researchers say it is all the foods together in the Mediterranean diet that make the difference. So they say people should eat a lot of fruits, vegetables, beans and fish. And they should use olive oil in their cooking.