PCA (Prometheus Certified Associate) sample exam question with answer 267

Question:
What is Prometheus remote writing?

1. The ability for an external system to query Prometheus storage (TSDB) directly without PromQL evaluation
2. The ability for a Prometheus server to scrape selected time series from another Prometheus server
3. The ability for Prometheus to stream samples to an endpoint
4. The ability for Prometheus to remotely write alert data to Alertmanager without being on the same host

Answer:
C - correct, more on remote write
A - this is the definition of Prometheus remote reading
B - this is the definition of Prometheus federation
D - is incorrect as remote writing is the ability for Prometheus to stream samples to an endpoint, it has nothing to do with alerts