A company wants to ensure their website, which allows customers to purchase products, is in a cluster at another geographical location. Which of the following solutions does this represent?

Differential backups are a data backup method that copies data changed since the last full backup, and do not represent a geographically redundant site or cluster strategy.

Data deduplication is a storage optimization technique that eliminates redundant data copies to reduce capacity usage, which is unrelated to site-level geographic redundancy.

A cold site is a disaster recovery strategy in which a geographically separate location holds the physical or virtual infrastructure required to bring systems back online after a failure, but is not actively running under normal conditions. Placing a website cluster at another geographical location represents this model, ensuring the business can recover operations remotely. This protects a revenue-generating site from region-level outages or disasters.

High availability describes designs that keep a service continuously operational through redundancy and automatic failover mechanisms, typically within the same active infrastructure rather than a separate standby geographic cluster.