PCA (Prometheus Certified Associate) sample exam question with answer 270

Question:
Which of the following types of observability data is MOST closely related to the definition given below?
Activity of a transaction or request as it flows through applications and shows how services connect, including code-level details

1. Log
2. Metric
3. Trace
4. Event

Answer:
C - is the correct answer
A - is incorrect as a log is defined as a textual record that describes an event, commonly structured with key-value-based metadata
B - is incorrect as a metric is defined as numeric measurement
D - is incorrect as an event is simply defined as an occurrence of something