You are developing a Lambda function by packaging the Python code and dependencies in a container image which is stored in an AWS ECR repository. There is a requirement to add extensions to the Lambda function for the integration with governance tools. You have already prepared the extension code as my-extension.zip. What is the correct way to add the extensions to the Lambda function?

Answer options:

A.In the Lambda console, edit the Lambda function code and add the my-extension.zip file to the /opt/extensions/ folder to install the governance tools.
B.In the Dockerfile, add the my-extension.zip file to the /opt folder. Rebuild the Docker image and deploy the Docker container image to the Lambda function.
C.Use AWS Lambda CLI update-function-code or update-function-configuration command to upload the my-extension.zip file, unzip it and install the extensions.
D.Lambda extensions cannot be added to a container image. Instead, the Lambda function should use Lambda layers and the extension zip file should be added as a layer.

Correct Answer: B
Option A is incorrect because the Lambda function is managed with a Docker container image. Users should not directly edit the Lambda function code through the Lambda console.
Option B is CORRECT because the extensions files should be packaged into the /opt directory in the container image to use extensions in container images of Lambda functions. After the my-extension.zip file is put in the /opt folder, Lambda functions will use the Extensions API to manage the extension lifecycle.
Option C is incorrect because update-function-code updates a Lambda function’s code, and update-function-configuration modifies Lambda settings. Either of them cannot add extensions to Docker images.
Option D is incorrect because extensions can be added to the container image of the Lambda function.
References:
https://docs.aws.amazon.com/lambda/latest/dg/images-create.html 
https://docs.aws.amazon.com/lambda/latest/dg/using-extensions.html
https://docs.aws.amazon.com/cli/latest/reference/lambda/update-function-configuration.html