What is the main idea of the passage?
A.
Showdown is a table sport that was created by two blind men named Joe Lewis and Patrick York in the 1960s.
B.
Showdown rules are created by the International Blind Sports Federation, which prohibits sighted players.
C.
Showdown matches are usually played in three sets, and the winner must reach 11 points before the other player.
D.
Showdown is a table sport that can be played by either blind or sighted players using bats and an "audible ball."
Passage: Showdown by J. Robbins
Showdown is a fast-moving table game designed for blind and visually impaired players. It was invented in the late 1960s by Joe Lewis and Patrick York, both of whom were blind. They wanted to create a sport that could be played without relying on assistance from a sighted person. Showdown debuted as a recreational sport at the 1980 Olympiad for the Physically Disabled. Since that time, the game has been recognized by the International Blind Sports Federation (IBSA) and has grown in popularity.
A game of showdown is played by two players on a rectangular table with a center net and goal pockets on each end. The objective of the game is to use a bat to bounce an "audible ball" off the sidewall, across the table, under the center net, and into the opponent's goal. An "audible ball" contains stainless steel pellets that make noise to indicate the ball's location. Matches are usually played in three sets, and the first player to reach 11 points wins the set. Sighted players can participate in recreational showdown matches, but they are not allowed to participate in IBSA tournaments.
