The answer is b visionary. When the animals were to successful take control of the farm from the humans everyone was jubilant from their victory. Benjamin on the other hand, was not as excited about it as the others. He seems to know that what the future may bring based on past events and how things go about in the present. He can already foretell what will happen in the long run. Still, he keeps it all to himself knowing that the only thing that changed was the one in charge of the farm. He can envision the future but he sees it in a pessimistic light.
A schedule is simply a plan to be somewhere or do something. From the passage, we can see that the context in which the word "schedule" was used is talking about the bus being behind the planned time it was supposed to take off.
