You are creating a solution to remove backup files older than 90 days from your backup Cloud Storage bucket. You want to optimize ongoing Cloud Storage spend. What should you do? 

Answer options:

A. Write a lifecycle management rule in XML and push it to the bucket with gsutil
B. Write a lifecycle management rule in JSON and push it to the bucket with gsutil
C. Schedule a cron script using gsutil ls "lr gs://backups/** to find and remove items older than 90 days
D. Schedule a cron script using gsutil ls "l gs://backups/** to find and remove items older than 90 days and schedule it with cron

B