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A. B. C. D. Answer - A.
This is also mentioned in the AWS Documentation.
In API Gateway, a deployment is represented by a Deployment resource.
It is like an executable of an API represented by a RestApi resource.
For the client to call your API, you must create a deployment and associate a stage to it.
A stage is represented by a Stage resource and represents a snapshot of the API, including methods, integrations, models, mapping templates, Lambda authorizers (formerly known as custom authorizers), etc.
Option B is incorrect since this is only required for cross-domain requests.
Option C is incorrect since this is only required when you want to use your code to call the API gateway, and there is no mention of that requirement in the question.
Option D is incorrect since this is only required if the request is not text-based.
