Operating System( Virtualization on Ubuntu )

Question:
You are tasked to install Ubuntu on a virtual machine software such as Oracle VM VirtualBox in your laptop. After you have successfully done the installation, present it to the course instructor to claim marks for this question.

Answer:
Actually, I have found 3 solutions for this question.
1. Oracle VM VirtualBox : free of charge, but lag
2. parallel desktop : high performance, but need to pay
3. dual boot : free & high performance( not shown in this video )