Which of the following sentences expresses the main idea of the article? A.Pickleball is often played in parks, but it's also played by residents in retirement communities. B.Pickleball is a unique sport that combines parts of several sports, and it is growing in popularity. C.Pickleball games are competitive, and players win points by hitting the ball over a net before it bounces twice. D.Pickleball players must steer clear of the non-volley zone, but that can be very difficult at times.
