Answer:
Since Jane prefers a to b and b to c, then she must find a at least as good as b and b at least as good as c. Transitivity would imply that a is at least as good as c. But she prefers c to a, then a cannot be at least as good as c. So jane's statements violate transitivity. Completeness is satisfied because between any to alternatives one is at least as good as the other.