which best describes what a market index does?an index measures market performance.an index measures…

which best describes what a market index does?an index measures market performance.an index measures economic trends.an index measures growth.an index measures the performance of a single stock.
Answer
Brief Explanations:
A market index is a composite tool designed to track the overall performance of a segment or the entire market, not just economic trends, general growth, or a single stock.
Answer:
A. An index measures market performance.