The answer is C. Proprietary software is when the publisher reserves rights from licensees to modify or share the software.
Its B i think hope this helps !
Answer:
I'm stuck on this but the correct answers I would at-least pick is A and C I need more information about what operating system you have on the computer.
Ive done this before with success.
You will need <span>FFmpeg.</span>
https://superuser.com/questions/227338/how-to-convert-an-mkv-to-avi-with-minimal-loss