11. Which of the following is true about copyright? A. In order to qualify for copyright protection, an original work of authorship must be fixed in an tangible medium of expression, meaning in part that it must be adequately stable or permanent enough to be perceivable and reproducible. B. The distinction between an idea and its expression is often so subtle that in order to protect the expression the idea must be protected also. C. Pseudonymous works can be copyrighted, but anonymous works cannot. D. All of the above. A & C. B & C. A & B