Answer:
A. Blade
Explanation:
Server Blade means a complete computer system on a single board which includes one or more CPUs, memory, operating system, network connections, and typically includes access to hard drives or other mass storage devices. A Server Blade is designed to be inserted into a space-saving rack, and each rack may contain a number of Server Blades served by one or more power supplies.
If this is multiple choice, a dedicated server can be too.
