A popular auctioning platform requires near-real-time access to dynamic bidding information. The platform must be available at all times. The current Amazon RDS instance often reaches 100% CPU utilization during the weekend auction and can no longer be resized. To improve application performance, a sysops administrator is evaluating Amazon ElastiCache, and has chosen Redis (cluster mode enabled) instead of Memcached.
What are reasons for making this choice? (Choose two.)

A. Data partitioning
B. Multi-threaded processing
C. Multi-AZ with automatic failover
D. Multi-region with automatic failover
E. Online resharding