A Company Is Using an Amazon ElastiCache for Redis Cluster

A company is using an Amazon ElastiCache for Redis cluster in a production environment. To align with the company's technical requirements, a SysOps administrator needs to select a deployment to provide increased availability and fault tolerance. Which action should the SysOps administrator take to accomplish this goal?

A) Deploy the ElastiCache cluster with Memcached as the engine.
B) Deploy the Redis cluster within an Auto Scaling group to launch replicas across multiple Availability Zones.
C) Verify that cluster mode is disabled. Increase the number of shards.
D) Verify that Multi-AZ with automatic failover is enabled. Place replicas in multiple Availability Zones.