What should you do?

Your organization is a financial company that needs to store audit log files for 3 years. Your organization has hundreds of Google Cloud projects. You need to implement a cost-effective approach for log file retention.

What should you do?
A . Create an export to the sink that saves logs from Cloud Audit to BigQuery.
B . Create an export to the sink that saves logs from Cloud Audit to a Coldline Storage bucket.
C . Write a custom script that uses logging API to copy the logs from Stackdriver logs to BigQuery.
D . Export these logs to Cloud Pub/Sub and write a Cloud Dataflow pipeline to store logs to Cloud SQ

Answer: B

Explanation:

Reference: https://cloud.google.com/logging/docs/audit/