This question actually doesn't require us to factor in anything specific as it is only asking for us to choose the answer choice that is a possible scenario.
Every answer choice other than the correct answer presents an order that violates some rule or another. For some reason, the test makers decided to test the same deduction for 3 of the 4 incorrect answer choices in this question. They wants us to see that the relative order between S, Y, and T is S before Y before T.
This is violated in answer choices A, B, and D. Answer choice C violates the last rule that U is before R.
This is how we are left with E as the only possible scenario.
I hope this helps. Please let me know if you have any other questions!