Everyone likes repertory theater. Actors like it because playing different roles each night decreases their level of boredom. Stagehands like it because changing sets every night means more overtime and, thus, higher pay. Theater managers like it because, if plays that reflect audience demand are chosen for production, most performances generate large revenues. It is evident, ttherefore, that more theaters should change to repertory. The argument above would be strengthened if which one of the following were true? ['In a repertory theater, storage space for sets for more than one production must be available.', 'In a repertory theater, a large capital outlay is required at the beginning of each season.', 'In a repertory theater, plays can be rescheduled to meet audience demand.', 'In a repertory theater, some actors who change roles from night to night find it difficult to master all of the roles they play.']