A company's online transaction system processes high-value financial transactions and cannot afford significant data loss. The company wants to ensure that in the event of a system failure, they can recover the most recent transaction data with minimal loss. Which of the following recovery strategies is the BEST to meet the company's requirement?
An RPO of 24 hours, with daily off-site backups.
An RPO of zero, with real-time replication to a secondary site.
An RPO of 1 hour, with hourly backups.
Increasing the frequency of the backup every 30 minutes.