Directions: This question consists of a sentence, parts of which have been jumbled. These parts have been labeled as P, Q, R, and S. Given below each sentence are four sequences, namely (a), (b), (c), and (d). You are required to re-arrange the jumbled parts of the sentence and mark your response accordingly. 

they used to (P) / movie trailers are called (Q) / run after the movie (R) / because (S)