Counters for nearly all other flights were displayed , ours was missing . So we walked by the counters again and again , those showing all kinds of destinations , but not Langkawi . Finally we discovered two counters without displays and yes , we guessed correctly .

Available options:
a). None of the above choices .;
b). The flight was cancelled .;
c). The flight was postponed .;
d). The flight information were on the blank monitors .;
Q: What may be the reason to not see the flight ?
d).