hard · LSAT Logical Reasoning
Over the past decade, coastal towns that installed offshore wind turbines saw their local fish catches rise substantially, whereas comparable towns without turbines saw no such rise. Marine biologists concluded that the turbines' underwater foundations, by acting as artificial reefs, increased local fish populations.
Which one of the following, if true, most strengthens the biologists' argument?
- The turbine foundations were built with techniques known to produce stable underwater structures.
- Tourism increased more in the turbine towns than in the comparison towns during the decade.
- Throughout the decade, the turbine towns and the non-turbine towns were subject to the same regional fishing quotas and the same ocean-temperature trends.
- During the decade, the towns that installed turbines also imposed far stricter limits on commercial trawling than the towns without turbines did, and increased enforcement patrols during the spawning season.
- Offshore wind turbines generate electricity at a lower cost than coal-fired plants in coastal regions.
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