In a town containing a tourist attraction, hotel and restaurant revenues each increased more rapidly over the past year than did revenue from the sale of passes to the attraction, which are valid for a full year.
Curious Fact
How come the revenue at our town's hotels and restaurants have gone up more than the revenues at our town's tourist attraction?
Author's Explanation/Hypothesis
The people visiting the tourist attraction are illicitly selling or sharing the passes with others.
Evaluate
It might take a sec to process what this whole story is describing. It starts with the assumption that if people come to our town and stay at our hotel and eat at our restaurants, they will surely visit our tourist attraction as well, right?
Since the revenue is at the hotels / restaurants is going up more than the revenue at the tourist attraction (and since the people are assuming that anyone going to the former would also go to the latter), they are thinking to themselves,
And that's how they arrive at the causal explanation that people who visit the tourist attraction are then selling or sharing their passes (which are good for a year) with others.
Goal
Since we're trying to find four answers that Weaken, we want them to either suggest an Alternate Explanation for the Curious Fact or we want them to lower the plausibility of the storyline that visitors are sharing / selling their passes.
(maybe people don't want to see the tourist attraction that much / maybe locals have started to spend more money at the hotels and restaurants), or (the passes have a photo on them, so it's hard to get in with someone else's pass).