|Question 8Verbal

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Optimal foraging theory (OFT) holds that animals' foraging behaviors reflect cost-benefit trade-offs that vary by species and with dynamic ecological circumstances. One such circumstance is lunar intensity, which Nathan Upham and John Hafner found to be negatively associated with foraging by desert kangaroo rats but Eduardo Fernández-Duque and colleagues found to be positively associated with foraging by Azara's night monkeys. This discrepancy is explicable in terms of OFT: the monkeys' greater reliance on vision means that higher lunar intensity benefits them more than it benefits the kangaroo rats.
According to the text, the difference between Upham and Hafner's findings and Fernández-Duque and colleagues' findings can be attributed to which difference between desert kangaroo rats and Azara's night monkeys?
The kangaroo rats decrease their foraging activity as lunar intensity increases, whereas the monkeys increase their foraging activity.
A
The kangaroo rats are more vulnerable to predators than the monkeys are.
B
The kangaroo rats are less reliant on vision than the monkeys are.
C
The kangaroo rats encounter different levels of lunar intensity than the monkeys do.
D