This question asks what answer fully determines the order. I used the scenarios to eliminate answers. For example, A asks whether placing Quarry third determines everything.
Q can be third in both scenarios 2 and 4. So clearly, placing Q third doesn’t determine everything, as those two scenarios are different. A is not right.
B is also wrong. R is first in the first scenario, yet there are two possibilities: Q and S are interchangeable between second and first:
Scenario 1
C is CORRECT. S can be second only in the first scenario. And if S is second, Q is fourth, so everything else is determined:
D is wrong. T can be fifth in the 1st, 2nd and 3rd scenarios.
E is wrong. V can be fourth in both the 2nd and 4th scenarios.
Remember, an answer is wrong if there are multiple possibilities. That means the placement in the answer doesn’t completely determine the order.
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