Question ID:PT50 S3 Q3 Passage:At each of six consecutive stops‚ 1, 2, 3, 4, 5, and 6‚ that a traveler must make in that order as part of a trip, she can choose one from among exactly four airlines‚ L, M, N, and O‚ on which to continue.  Her choices must conform to the following constraints: Whichever airline she chooses at a stop, she chooses one of the other airlines at the next stop.She chooses the same airline at stop 1 as she does at stop 6.She chooses the same airline at stop 2 as she does at stop 4.Whenever she chooses either L or M at a stop, she does not choose N at the next stop.At stop 5, she chooses N or O. Stem:If the only airlines the traveler chooses for the trip are M, N, and O, and she chooses O at stop 5, then the airlines she chooses at stops 1, 2, and 3, must be, respectively, Correct Answer Choice:CChoice A:M, O, and N Choice B:M, N, and O Choice C:N, M, and O Choice D:N, O, and M Choice E:O, M, and N