If some files appear dimmed in one of the default folders on your computer, the best course of action would be to A. leave the files as they are.
These files are probably either hidden or system files, which are never meant to be deleted or moved.
A negative externality is when a good costs much greater than what the consumer pays for it. Since you did not provide the possible answers, use this explanation to find the correct answer among the ones you might have.
