Final answer:
The correct answer to the question is D. Environment, token, instances, which refers to removing a variable from the environment across all instances. This is a common task in software development environments.
Step-by-step explanation:
You can remove a variable from the environment—just click on Edit and then Del. This will delete the variable in all the instances. The correct answer is D. Environment, token, instances.
In the context of computer science and software engineering, an environment refers to a set of variables that can affect the way running processes will behave on a computer. For example, in software development, environment variables can determine paths for executable files or settings for software debugging. When you want to remove or edit an environment variable, you typically access the environment's configuration, make your changes, and then those changes will be reflected across all instances that utilize that variable.