Which statement about the four extra digits in a 9-digit postal code is accurate?

Which statement about the four extra digits in a 9-digit postal code is accurate?

• A. They identify a city-wide area
• B. They identify the county
• C. They identify a specific geographic segment within the five-digit postal code
• D. They identify the delivery route

Answer: (C)

Four extra digits in a 9-digit postal code refine the location to a specific geographic segment inside the five-digit ZIP code. This allows mail to be sorted and delivered to a precise area—such as a small block, a group of addresses, a single building, or a business—within that ZIP code. That finer subdivision is why this choice is the most accurate: it goes beyond broad areas like city-wide regions or counties and focuses on a particular part of the ZIP code area. While those extra digits can aid routing, their primary purpose is to designate that exact segment within the five-digit code.

Four extra digits in a 9-digit postal code refine the location to a specific geographic segment inside the five-digit ZIP code. This allows mail to be sorted and delivered to a precise area—such as a small block, a group of addresses, a single building, or a business—within that ZIP code. That finer subdivision is why this choice is the most accurate: it goes beyond broad areas like city-wide regions or counties and focuses on a particular part of the ZIP code area. While those extra digits can aid routing, their primary purpose is to designate that exact segment within the five-digit code.