Which of the following data replication methods is utilized by Amazon RDS read-replica instances?

Answer options:

A.Multi-master replication
B.Lazy replication
C.Synchronous replication
D.Asynchronous replication

Answer: D
Option A is incorrect because Amazon RDS does not use multi-master replication for the read replica instances. Instead, data is replicated asynchronously to the secondary read replica nodes.
Option B is incorrect because Amazon RDS does not use lazy replication for read replica instances. Instead, data is replicated asynchronously to the secondary read replica nodes.
Option C is incorrect because Amazon RDS does not use synchronous replication for the read replica instances. Instead, data is replicated asynchronously to the secondary read replica nodes.
Option D is CORRECT because Amazon RDS utilizes an asynchronous method to replicate changes in the primary Amazon RDS instance to secondary read replica instances.
Reference:
https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ReadRepl.html