How should the consultant implement this requirement in Order Management with the least amount of configurations?

During the discovery phase a consultant learns that provisioning the internet service requires multiple steps of integration. The first step returns as identifier that is required for the second steps, but is meaningless in ensuring steps afterwards.

How should the consultant implement this requirement in Order Management with the least amount of configurations?
A . Model a non- assetizable attribute on the technical product to hold the identifiers configure both orchestration items for provisioning on the same swimlane
B . Create a Callout that uses a customer adaptor. This adaptor is implemented in Apex and can make both callouts and keep the identifier in memory in between callouts
C . Implement the integration using an integration procedure, which can make both callouts, and pass identifier as a variable from one step to another
D . Implement the multiple call logic in Enterprise service Bus and have a single callout to the ESB in orchestration

Answer: A