In the section "Investigating Life: The Hidden Cost of Traps",what hypothesis were the researchers testing?

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The researchers were testing the hypothesis that providing extra nutrients would increase leaf production, and therefore decrease the need for plants to use traps to obtain more nutrients. This is stated in the section: "They hypothesized that if nutrients were not a limiting factor, then the pitcher plants might produce more leaves and thus reduce the need for the high cost of sticky traps."

In the Section "Investigating Life: the Hidden Cost of Traps",what