Answer: Ideas
Explanation: In the given case, the group is offering the service of ideas.The contest will make the participants to use their creativity and innovation. The contest arranged has no such rules and procedures specified so the participants can work with an open mind.
This strategy by group will have a dual effect, first it will increase the awareness and second it will give the group new ideas for the posters.
Hence from the above we can conclude that the correct option is C.
