PCA (Prometheus Certified Associate) sample exam question with answer 539

Question:
What is the definition of a log?

1. A textual representation of an event, commonly structured with key-value pairs
2. A detailed accounting of distributed service-to-service calls in a transaction
3. A numeric measurement recorded over time
4. A numeric measurement

Answer:
A - is the correct answer
B - is incorrect as this is the definition of a distributed trace
C - is incorrect as this is the definition of a time series
D - is incorrect as this is the definition of a metric