PCA (Prometheus Certified Associate) sample exam question with answer 212

Question:
What is the purpose of the for attribute in a Prometheus alert rule?

1. Tells alertmanager how long to wait before firing a notification
2. Determines which team team the alert is for
3. Specifies how frequently to fire the alert
4. Determines how long a rule must be true before firing an alert

Answer:
D - is the correct answer