Hi Emmanuel — Hope the studying is going well —
The Q stem is asking us to find an answer that, if true, determines for us, with certainty, where every element must go —
Answer choice (E) gives us a XWT trio —
Note that the first diagram forces T to be before W, so we can’t use that — (note that your example had both S and W before T, which violates the fourth rule)
There are a couple of ways to fit XWT into the second diagram, namely: XWTSVR and XWTRSV —
And so since the information given to us in answer (E) doesn’t allow us to figure out where every element must be placed, (E) is not the correct answer.
I hope that clears it up and if u you have any follow-up q’s just let me know! – Best, Mike