There are six licenses available which combine the four conditions.
The CC BY license is the most open, meaning others may copy, distribute, display or perform the work or derivatives based upon the work in any form or medium, as long as they give the creator credit in whatever way the creator requests.
The least open is the CC BY NC ND license, which allows users to copy, distribute, display or perform only verbatim copies of the original work and the work cannot be used for commercial purposes. In addition, the original creator must be cited in whatever way the creator requires.