To use photographs for a paid commission in a digital collage, the photographs must allow for commercial use and modification. The two correct Creative Commons licenses that would permit this are:
- CC BY (Creative Commons Attribution) - Allows for commercial use and modification as long as the original creator is credited.
- CC BY-ND (Creative Commons Attribution-NoDerivatives) - Allows for commercial use but does not allow for modifications, so this option would not be suitable for collage creation where adaptation is needed.
Therefore, the best answer is:
- CC BY (which permits commercial use and modifications).
Since the illustrator intends to modify the photos but has public interest in mind, the more suitable answer is just CC BY.
CCO (Creative Commons Zero) - is also a potential option since it places no restrictions, allowing for commercial use and modifications.
So, the two correct answers for this specific scenario would be:
- CC BY
- CCO
The illustrator should verify the specific conditions of each license before proceeding.