A development team is looking to manage environment-specific settings for their e-commerce web service interface, which routes incoming requests to the same backend AWS Lambda functions. They want to ensure that while the Lambda codebase remains identical, the behavior can be customized based on the environment it's deployed in. How should the team achieve this distinction within the web service interface provided by AWS?
Utilize environment configuration parameters, unique to each deployment stage of the web service interface, to pass specific values to the backend without changing the functions.
Establish distinct backend functions for each deployment stage to manage the configuration differences, and allocate them to the web service interface accordingly.
Introduce separate interface methods distinguished by the intended environment to control the routing of requests.
Alter the backend function code to incorporate environment-specific logic, and bundle this variance within the function deployment package.