Which of these problems can be best served to community action?

A. Connor is thinking about joining the high school basketball team, but he is not very tall and he feels inferior to other boys his age.

B. Rebecca, who lives in a town with inadequate medical facilities, need to see a doctor regularly to monitor her diabetes.

C. Thierry often leaves his bike by the back stairs, making it difficult for others to pass without tripping or scraping themselves on it.