Correct answer - "Use AWS Lambda aliases" : AWS Lambda also supports creating aliases for each of
your Lambda function versions. Conceptually, an AWS Lambda alias is a pointer to a specific
Lambda function version. It is also a resource similar to a Lambda function, and each alias has
a unique ARN. Each alias maintains an ARN for the function version to which it points.
"Disable AWS Lambda versioning" - Although possible, aliases are a great way to shift traffic
when new versions are available
"Use environment variables" - Environment variables enable you to dynamically pass settings to
your function code
"Enable X-Ray integration" - You can use AWS X-Ray to trace your AWS Lambda functions