When creating a new RDS instance, what does the Multi-AZ option do?

1.  replicates backups of your database to S3 and makes them available across regions to prevent against any data loss
2.  creates a second passive database instance within the same region that will become the primary database during a failover
3.  creates a highly available database cluster that will host your database cluster in at least two regions
4.  creates another database instance in another region and keeps a hot standby active to failover to during regional failures

Correct Answer:

•  creates a second passive database instance within the same region that will become the primary database during a failover