How is this new package isolated from the main code base?

A set of automation scripts work with no issue from a local machine, but an experiment needs to take place with a new package found online.

How is this new package isolated from the main code base?
A . Add the new package to your requirements.txt file.
B . Create a new virtual machine and perform a pip install of the new package.
C . Perform a pip install of the new package when logged into your local machine as root.
D . Create a new virtual environment and perform a pip install of the new package.

Answer: D