Acorporation needs an operating system that allows the various teams in its office to network and collaborate on projects. which operating system should the corporation choose?
linux
microsoft windows
unix
ms dos

This totally depends on what they need and what they are willing to spend. If they just need access to google docs/ sheets etc for example (so just the web with a web browser), either Linux / Un*x or Windows will do and linux is the free choice. If they want to be part of the microsoft ecosystem or use some windows specific software they will need to use Windows or an emulator in Linux.

I would not recommend MSDOS in this day and age.

I would use Microsoft Windows its more user friendly and compatible to more software.

Answer by checking for voltage with a neon tester;