A legacy service has an XML-based SOAP interface. The Developer wants to expose the functionality of the service to external clients with the Amazon API Gateway. Which technique will accomplish this?

A. Create a RESTful API with the API Gateway; transform the incoming JSON into a valid XML message for the SOAP interface using mapping templates.
B. Create a RESTful API with the API Gateway; pass the incoming JSON to the SOAP interface through an Application Load Balancer.
C. Create a SOAP API with the API Gateway; pass the incoming XML to the SOAP interface through an Application Load Balancer.
D. Create a SOAP API with the API Gateway; transform the incoming XML into a valid message for the SOAP interface using mapping templates.