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Answer:
A. True
Explanation:
It is TRUE that Databases and EC2 instances are most performant using block-level storage.
This is evident in the fact that Databases applications utilize block-level storage in storing files and data, and at the same time that EC2; Amàzon Elastic Compute Cloud, through Amàzon Elastic Block Store utilizes block-level storage to store data.
Hence, in this case, the correct answer is TRUE.