You want to build an integration architecture that is largely asynchronous.

Asynchronous integration in SAP Integration Suite involves decoupling systems, often via notifications. Let’s evaluate the design:

Step 1: Asynchronous Context- Asynchronous means senders don’t wait for responses; notifications are pushed when events occur.

Step 2: Analyze Options-

A. Event-driven design: Systems react to events (e.g., via AMQP, Kafka), ideal for asynchronous notifications between partners.

B. Request-driven design: Synchronous, where a request expects a reply—not asynchronous.

C. Hexagonal design: An architectural pattern (ports and adapters) for modularity, not specific to async messaging.

D. Serverless design: Execution model (e.g., functions-as-a-service), not inherently tied to async notifications.

Step 3: SAP Relevance- SAP Integration Suite supports event-driven architectures with adapters like AMQP or SOAP (async), aligning with this design for notifications.

Step 4: Official Verification- The SAP Help Portal’s "Event-Driven Integration" section highlights event-driven design for asynchronous scenarios, such as notifying partners of changes.

Conclusion: Option A (Event-driven design) is the correct answer.References:

SAP Help Portal: "Event-Driven Integration" (SAP Integration Suite)

SAP Cloud Integration Documentation: "Asynchronous Processing"