Virtualization:

A. allows one operating system to manage several physical machines.

B. has enabled microprocessor manufacturers to reduce the size of transistors to the width of an atom.

C. can boost server utilization rates to 70% or higher.

D. allows smartphones to run full-fledged operating systems.

C. can boost server utilization rates to 70% or higher.

Explanation:

Virtualization -

It is the process of running virtual instance of the computer in the abstracted layer from the very actual hardware, is known as virtualization.

In this process multiple operating system can be operated on the single computer setup, it is useful for increasing the speed of the program.

Hence, from the question,

The correct statement with respect to virtualization is C. can boost server utilization rates to 70% or higher.