It is advised that you watch the Amazon CloudWatch " __ " metric (available via the AWS Management Console or Amazon Cloud Watch APIs) carefully and recreate the Read Replica should it fall behind due to replication errors.

It is advised that you watch the Amazon CloudWatch " __ " metric (available via the AWS Management Console or Amazon Cloud Watch APIs) carefully and recreate the Read Replica should it fall behind due to replication errors.
A . Write Lag
B . Read Replica
C . Replica Lag
D . Single Replica

Answer: C