Final answer:
Redis is the data store that survives reboots on ElastiCache.
Step-by-step explanation:
The correct answer is A) Redis. ElastiCache is a web service that allows you to easily set up, manage, and scale a distributed in-memory data store or cache environment in the cloud. Redis is a data store supported by ElastiCache, and it does survive reboots. This means that even if you reboot the server or restart the service, the data stored in Redis will still be accessible.