Final answer:
In an event-driven architecture, the enterprise operates in real time, enabling immediate processing and response to business events.
Step-by-step explanation:
In an event-driven architecture (EDA), the correct option is B: the enterprise operates in real time. Event-driven architectures are designed to respond to business events as they occur, which allows an enterprise to process information and react immediately to changes. This kind of architecture is distinguished by its ability to handle events asynchronously and in real-time, as opposed to processing events in batches or being limited to a single software vendor.