Question ID:PT50 S3 Q5 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 traveler chooses O at stop 2, which one of the following could be an accurate list of the airlines she chooses at stops 5 and 6, respectively? Correct Answer Choice:BChoice A:M, N Choice B:N, L Choice C:N, O Choice D:O, L Choice E:O, N