An application has elevated request latency across several services. The team needs to locate the slow dependency and inspect the detailed events for the same requests. Which two telemetry practices are most useful? Select 2 answers.

1. Include correlation identifiers in searchable structured application logs.
2. Increase log retention without adding request identifiers or traces.
3. Use the monthly billing invoice as the primary request-level latency record.
4. Inspect only total project CPU usage and assume it identifies the slow downstream call.
5. Propagate trace context and inspect distributed request spans.