A Company Has an Amazon RDS DB Instance

Multiple Choice

A company has an Amazon RDS DB instance. The company wants to implement a caching service while maintaining high availability. Which combination of actions will meet these requirements? (Choose two.)

A) Add Auto Discovery to the data store.
B) Create an Amazon ElastiCache for Memcached data store.
C) Create an Amazon ElastiCache for Redis data store.
D) Enable Multi-AZ for the data store.
E) Enable Multi-threading for the data store.