The primary purpose of an integration environment is to combine individual units, modules, or service components that have been developed separately and test them as a group. This process verifies that the components interact correctly, that data flows between them as designed, and that their combined functionality meets requirements. Identifying and resolving interface and interoperability issues in this dedicated environment is crucial before the consolidated code is promoted to subsequent testing stages, such as staging or user acceptance testing.

A. To deploy final versions of services to customers: This is the function of the production or live environment, which is the final stage of the deployment process.

C. To create backups of production data: This is an operational data management activity and is not the purpose of a testing environment.

D. To develop new features for future releases: Feature development and unit testing occur in the development environment, prior to integration.

1. AXELOS. (2020). ITIL® 4 Practitioner: Deployment Management. PeopleCert. Section 4.2.2, "Deployment environments," defines the integration environment's role in testing the interactions between different service components.

2. Pressman, R. S., & Maxim, B. R. (2020). Software Engineering: A Practitioner's Approach (9th ed.). McGraw-Hill Education. Chapter 20, "Software Testing Strategies," details integration testing as a systematic technique for constructing the software architecture while conducting tests to uncover errors associated with interfacing.