Write the next sentence in this paragraph:

Two men hit a tennis ball against a white wall in a small gym room while onlookers watch. two men in sneakers and sweatpants

OPTIONS:
(a). bend over a bed while holding step stools.
(b). play racket ball inside an office.
(c). stand on the other side of a glass walled gym room and hit a tennis ball against a wall.
(d). perform a tennis match with one another in a tennis net in a sunny day, after all of them are covered with sweat.
(c).