To which of the following does copyright protection not apply

Question

A. Inventions
B. Images
C. Sounds
D. Video
My answer is c

Answer 1

Nope.

http://www.uspto.gov/trademarks-getting-started/trademark-basics/trademark-patent-or-copyright

Answer 2

I'm not really sure of my answer but my answer is a

Answer 3

You're right. Inventions are covered under patent laws, not copyright law.