PCA (Prometheus Certified Associate) sample exam question with answer 431

Question:
Which of the following is an objective of logging?

1. Measure numerical aspects of a system for anomaly detection
2. Aggregate textual event data from a service for troubleshooting
3. Identify bottlenecks in a multi-service transaction
4. Measure numerical aspects of a system for straightforward alerting

Answer:
B - is the correct answer
A, D - are incorrect as these are goals of monitoring
C - is incorrect as this is a goal of distributed tracing