Answer:
A. Supercomputer
Step-by-step explanation:
An embedded computer is a very small computer or processor that is installed to drive control other systems with the focus on performing one specific task.
Desktop computers, as the name implies, are mounted on desks, inexpensive and fast computational devices.
The mainframe a very large and expensive computers used by companies to run many applications or computations at a time, while supercomputers are similar but runs very few programs at a time.