You are an enterprise application developer. You are evaluating the physical design of a Web- based application. Fifty customers will use the application from different regions. The use of the application will trigger events of different severities. These events must be logged, extracted, and then filtered on the basis of customer, region, or severity of events. The event details also must be persisted, backed up, and archived for later retrieval. The development team plans to use an event log for logging events. On evaluation, you find the plan does not meet the requirements. You need to explain why an event log fails to meet the requirements. What should you conclude?

A.
Event logs cannot track custom application events.

B.
Event logs cannot be filtered to meet the requirements.

C.
Event logs cannot be backed up or archived.

D.
Event logs cannot be persisted and will be deleted when the Web server shuts down.