The developer can test the new feature under the integration environment by deactivating one of the active integration environment branches, creating a new active branch from integration and installing the module, and pushing the changes. This is because Enhanced Integration Environments have a limit of four active branches at a time, and each branch has its own dedicated database and services. The developer can use the Cloud CLI for Commerce tool to manage the branches and deploy the code changes. Verified References: [Magento 2.4 DevDocs] 1

Enhanced Integration Environments in Adobe Commerce Cloud have a limit on the number of active branches. If both integration branches are currently active, one must be deactivated to create a new active branch for testing.

Creating a New Active Integration Branch:

If there are already two active branches, deactivate one to free up space for a new branch.

Then create a new branch from the integration environment, apply the changes (such as installing the new module), and push the changes.

Why Option C is Correct:

Adobe Commerce Cloud limits the number of active integration branches. Deactivating an existing branch is necessary before creating a new active branch for testing.

Option A suggests duplicating a branch without addressing the active branch limitation, while Option B disregards the need to check branch active status, which could prevent successful deployment.