Final answer:
Hosting a virtual machine on a PC reduces the amount of physical hardware required, allowing multiple operating systems and applications to coexist on a single physical platform.
Step-by-step explanation:
The question asks about the advantages of hosting a virtual machine on a PC. The correct answer is B. Reduces the amount of physical hardware required. Using a virtual machine, various operating systems and applications can run on a single set of physical hardware, which allows organizations and individual users to maximize the utility of their physical hardware. This does not necessarily reduce the training employees need, nor does it reduce the CPU or RAM required on the host PC; in fact, running virtual machines can consume more CPU and RAM resources on the host system.