A

Explanation:
The correct answer is A, Purchasing department. The purchasing department is responsible for sourcing and procuring raw materials and components, which includes maintaining records of suppliers for each item in the inventory database. This department uses the database to track and manage supplier details to ensure efficient procurement processes. The stores department (B) typically manages inventory storage and movement, the accounts department (C) handles financial transactions and records, and the sales department (D) focuses on selling finished goods, none of which primarily deal with recording supplier details for raw materials or components.