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OpenTelemetry (OTel) provides

AA database engine optimised for analytics
BVendor neutral APIs for telemetry signals
CA proprietary CI tool for releasing software
DA graphical IDE for writing test cases
Answer & Solution
Correct answer: B. Vendor neutral APIs for telemetry signals
OpenTelemetry standardises instrumentation APIs and SDKs for observability signals (metrics, logs, traces). Telemetry data can be exported to any compatible backend (Jaeger, Prometheus, vendor SaaS), reducing vendor lock-in.
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