Concept:Parallel databases mainly improve speed, availability, and adaptability — not just having large amounts of hardware.
Explanation:Parallel databases process data using multiple computers or processors working together.
This setup gives better flexibility because it can handle different query types and workloads across many nodes.
It also provides high availability by using copies of data and fault-tolerant designs.
In addition, it delivers high performance because parallel processing speeds up complex queries.
However, “huge resources” is not considered an advantage by itself.
A parallel database focuses on using available resources efficiently, not on simply owning a large quantity of resources.
Answer:D. huge resources