Тестовый вопрос

Jancsi is a student trying to choose his college major. Initially, he considers only two options: architecture and business. Since Jancsi likes to think visually, he invents a way to represent his preferences in a graph like the one below, representing each major by a point and his preferences as arrows:

In Jancsi's graphs, a point represents a possible major and an arrow from point a to point b exists if and only if option b is no better than option a (that is, a is preferred to b or Jancsi is indifferent between a and b). The above graph indicates that Jancsi prefers major a (architecture) to major b (business).

After drawing the graph above, Jancsi began to consider another possible major, computer science (major c), and then drew a new graph to represent his preferences between all three majors. Which of the graphs below Jancsi could have drawn?

а)

b)

c)

d)