Three balls – ‘a’, ‘b’ and ‘c’- roll along similar flat trac…

Three balls – ‘a’, ‘b’ and ‘c’- roll along similar flat tracks, such they have both rolled the same amount since starting . The track ball ‘a’ rolls along then will dip and rise ahead. Which ball will have a gone farther horizontally after ball ‘a’ mounts the rise if they both started at the same time?