In an experiment by simon and chabris (1999), participants were to watch people passing a basketball around and were told to keep track of some activity within the game. what was the distinctive feature of the scene? a) during the game, a person in a gorilla suit walked into and out of the scene; almost everyone failed to notice. b) during the game, a person in a gorilla suit walked into and out of the scene, nearly half failed to notice. c) a person in a gorilla suit was one of the ball passers, almost no one failed to notice. d) a person in a gorilla suit was one of the ball passers, nearly half failed to notice.