Does the solution fit the need?
Pick the best solution for the audience need - the one that is most likely to lead to the desired result.
Answer: C
Solution A: Girl Scout selects and checks out bird-watching books from library.
All information is relevant, but there is no expert feedback to correct or verify the scout's identification.
Solution B: Girl Scout reads bird-related nursery rhymes to pre-schoolers.
Reading to Preschoolers is a laudable thing to do, but reading a rhyme may not help the girl identify the bird.
Solution C: Girl Scout group reviews bird guides for a list of local birds and observes bird feeders at a "backyard zoo" with the regional extension agent.
This is the best choice because information, observation and expert feedback are all available.