Integration testing is conducted to verify that different software modules, services, or components function correctly when combined. This activity is most appropriately performed in a dedicated 'Test' environment. This environment is designed to be a stable, controlled replica of the production setup, allowing testers to validate end-to-end processes and data flows between integrated components without affecting live services or ongoing development activities.

A: The development environment is where individual components are built and undergo unit testing, not where they are integrated for formal testing.

B: 'Live' is synonymous with the production environment, where changes should only be deployed after thorough testing has been completed.

D: The production environment is for end-user access and business operations; conducting initial integration testing here poses a high risk of service disruption.

1. AXELOS. (2020). ITIL® 4 Practitioner: Deployment Management. TSO (The Stationery Office). Section 3.2.1, "Environments," outlines the typical sequence of environments, placing the test environment after development and before production for activities like integration testing.

2. AXELOS. (2020). ITIL® 4 Practitioner: Deployment Management. TSO (The Stationery Office). Section 3.2.2, "Testing," discusses different levels of testing, implying that integration testing occurs in a pre-production environment.