Explanation
A microservice architecture is a way of designing software applications as a collection of loosely coupled services, each of which implements a specific business function. Microservices enable modularity, scalability, and agility in software development, as well as easier testing and deployment. By breaking up the monolithic web service into smaller pieces, each responsible for a single integration, UC can decouple the systems and improve the performance of the integrations. For example, UC can use Salesforce Platform Events to publish and subscribe to events from Salesforce to the legacy billing application, the ERP application, and the data lake. This way, UC can avoid point-to-point integrations and leverage an event-driven architecture that reduces coupling and increases reliability12.
The other options are not as effective as option B. Option A does not address the root cause of the tight interdependencies between systems, and may not result in significant performance improvement. Option C may improve the throughput of data loading into Salesforce, but it does not solve the problem of coupling between systems. Option D may reduce the latency and maintenance costs of the web service, but it does not change the design of the web service or the integrations.
References: 1: Microservice Architectures With Sales and Service Cloud - Salesforce Live 2: 6 Fundamental Principles of Microservice Design | Salesforce