Read the draft passage. [1] A theater company gave an understudy one compressed rehearsal before a lead actor's planned absence. [2] Because the final scene contained the most complex speech, most rehearsal time focused there. [3] The understudy delivered that scene confidently during the performance. [4] Earlier in the play, however, missed entrances and uncertain prop handoffs disrupted transitions between scenes. [5] The company revised future understudy rehearsals to trace cue chains and relationships across the full production. [6] The draft argues that preparedness cannot be judged only by success at the most visible task when less visible connections determine whether the whole system works. Which sentence best reflects on why the disrupted transitions matter?