I believe this Quiz Question from Quiz 74 is incorrect. Here is the question and suggested answer:
However, here is a screenshot showing how you can change the transition based on state. First, click on the transition arrow between Any State and HumanoidIdleJumpUp (1). Then click on Preview source state drop-down box in the Inspector (2). Here there are options to pick the state to transition from, and you can adjust in the section below as expected:
Please let me know if I misunderstood the question, or if you also think I am correct; that this question has the wrong answer.
Thanks!