This question tests your ability to apply the ordering rules. Let’s look at them again:
The question places V third:
We know that Y has to go in slots 1-2. Who else can go there?
Not U. They must go 4-6.
Not Z. They must go after V
Not X. They must go after Z.
So only W can also go in slots 1-2. We get this diagram:
The commas indicate that variables are interchangeable, while the line between Z – X indicates that there’s an ordering rule for them to obey.
You might have seen Powerscore draw Y and W like this: Y/W W/Y
That works too. However, that method doesn’t work well for slots 4-6, which is why I prefer my more flexible method. You get a very clear view of where every variable can go.
B is CORRECT. W has to be 1st or 2nd, so they are always before Z in this scenario.
A, C and E are wrong because U could be before Z – X, in between them, or after them.
D is wrong because Y and W are interchangeable in this scenario.
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