How does the CPI provide an accurate indication of inflation within a country?

Answer: The CPI provides an accurate indicator of inflation within a country on the grounds that it compares different prices in domestic and imported services. And it also measures several areas such as metropolitan and urban areas, the professional sector, the unemployed sector, etc

D. The CPI measures urban household spending on a "market basket" in a calculation to see how the average prices of goods and services have changed over time.