What is the best way to combine sentences 13 and 14? A. Using parks in this way takes coordination and effort, and people want to use the same field. B. Using parks in this way takes coordination and effort even though people want to use the same field. C. Using parks in this way takes coordination and effort because many people want to use the same field. D. Using parks in this way takes coordination and effort, but people want to use the same field.