The Creative Commons site has a simple way to choose a license for your work. Try the license chooser or the new beta version of the license chooser.
A decision to use a CC license on a work not only involves the type of license, but other considerations:
- A CC license cannot be revoked.
- A CC license is not used for software and physical objects.
- Make sure you as the creator are also the copyright holder. With work-for-hire the copyright holder may not be the creator, but the institution may hold copyright. Seek permission to apply a CC license in this case.
- CC licenses cannot be used on public domain material.
- Consult the CC Wiki for more considerations.