Shut up test.
Copy-paste all the time.

With Option A you introduce way too much complexity and maintainance. How would you know the behaviour of other system and take responsibility to have it updated in salesforce? and why even?

With Option D External data can be updated in real time and stays fresh after capturing changes with Change Data Capture event notifications in near real-time.
This is not very complex as well. CDC is used for a simple, one-way, outbound, data broadcast from Salesforce. For example, say that an external system wants to receive a broadcast every time a Salesforce account record is created, updated, deleted, or un-deleted.
You can subscribe to change events with CometD, Pub/Sub API, or Apex triggers. CometD is a messaging library that enables listening to events through long polling and simulates push technology. Pub/Sub API is based on gRPC and HTTP/2 and enables clients to control the volume of event messages received. Apex triggers for change events are similar to Apex triggers on platform events....

A NOT D
Implementation Complexity: Implementing Change Data Capture (CDC) requires each external system to actively subscribe to and process change events from Salesforce. This can introduce complexity, as each system must have the capability to handle real-time event streams, which might not be feasible or straightforward for all of UC's systems, especially if they vary in technology and architecture.

Consistency and Reliability: While CDC is a powerful feature for real-time data synchronization, relying on each external system to pull changes might result in varying degrees of latency or reliability in how quickly and effectively these changes are applied. This decentralized approach to data synchronization could potentially lead to inconsistencies in how up-to-date each system is, especially if there are issues in the consumption of the change events.

Resource and Load Considerations: Continuously polling or subscribing to change events can impose additional load on both Salesforce and the external systems, especially if the volume of changes is high. This can affect system performance and may require careful management of resources and bandwidth to ensure smooth operation.

Operational Overhead: Managing a CDC-based integration across multiple systems increases the operational overhead in terms of setup, monitoring, and maintenance. Each system's integration needs to be individually configured and managed to ensure it properly handles the change events from Salesforce, which can be resource-intensive....