A gaming company has implemented a leaderboard in AWS using a Sorted Set data structure within Amazon ElastiCache for Redis. The ElastiCache cluster has been deployed with cluster mode disabled and has a replication group deployed with two additional replicas. The company is planning for a worldwide gaming event and is anticipating a higher write load than what the current cluster can handle. Which method should a Database Specialist use to scale the ElastiCache cluster ahead of the upcoming event?

Topic #: - All AWS Certified Database - Specialty Questions

A. Enable cluster mode on the existing ElastiCache cluster and configure separate shards for the Sorted Set across all nodes in the cluster.
B. Increase the size of the ElastiCache cluster nodes to a larger instance size.
C. Create an additional ElastiCache cluster and load-balance traffic between the two clusters.
D. Use the EXPIRE command and set a higher time to live (TTL) after each call to increment a given key.

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