A developer is creating a web service that will assist a company's new employees during onboarding. The eb service must interact with several corporate systems. For example, the web service must log a request ith the IT team for a new notebook and must request an access card from security. Each request can ccur in parallel. When all the steps are complete, the web service returns either a successful response or n error.
The web service is invoked by a single REST request to an Amazon API Gateway API. The REST request eturns the reference number. Data that is captured can be captured only once.
Which solution will meet these requirements MOST cost-effectively?

A. Set up AWS Step Functions Synchronous Express Workflows to process the data
B. Set up AWS Step Functions Asynchronous Express Workflows to process the data
C. Set up AWS Step Functions Standard Workflows to process the data
D. Set up Amazon Simple Notification Service (Amazon SNS) to process the data. Push the request to an HTTPS endpoint