An application development team is looking to implement a caching solution with cross-region read replica capability. What solution meets this requirement?

Answer options:

A.ElastiCache for Redis with cluster mode enabled
B.ElastiCache for Redis with --automatic-failover-enabled flag
C.ElastiCache for Redis with Global Datastore feature
D.Amazon DAX Cluster

Answer: C
Option A is incorrect because cluster mode enabled does not offer cross-region replication.
Option B is incorrect because ElastiCache –automatic-failover-enabled flag is used for multi-AZ automatic failover. It is not used for creating read-replicas.
Option C is CORRECT because the Global Datastore feature for ElastiCache can be used to create cross-region read replica clusters.
Option D is incorrect because DAX is a DynamoDB specific caching solution. It also does not offer cross-region replication.
Reference:
https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Redis-Global-Datastore.html