Researchers investigating a sand filter system observe that pathogen inactivation correlates with quorum-sensing signal concentrations and microbial diversity within the biofilm layer. What is the MOST plausible explanation for this correlation?

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High signal concentrations directly damage pathogen DNA.

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Microbial communication enhances predator-prey interactions.

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Biofilm communities exclude quorum-sensing bacteria to avoid instability.

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Quorum sensing in diverse communities facilitates cooperative pathogen degradation or suppression.

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Researchers investigating a sand filter system observe that pathogen inactivatio...

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