Which of the following is included in a Universal Product Code (UPC)?

A Universal Product Code (UPC) is a specific type of barcode widely used for tracking trade items in stores. This code includes several key components that help identify products uniquely.

The correct choice identifies the product item number as a crucial part of the UPC. The product item number, also known as the item reference number, is an essential element because it allows for the distinct identification of each product in inventory. When a product is scanned at a point of sale, the UPC enables retailers to retrieve the item's details, such as price and description, from a database.

While country identification, expiration dates, and manufacturer's country codes serve important functions in product management and regulation, these elements are not inherently part of the UPC itself. The UPC primarily focuses on a unique item number to streamline the identification and inventory processes for retailers and manufacturers. This focus on product item numbers is integral to why businesses utilize UPCs in supply chain management effectively.