|Question 6Verbal

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The bird species Myiobius barbatus (the bearded flycatcher), which forages in relatively dense vegetation, and Platyrinchus saturatus (the cinnamon-crested spadebill), which forages in open areas or low-density vegetation, share territory in French Guiana with Thamnomanes caesius (the cinereous antshrike), which emits a loud alarm call when it detects predators. Biologist Ari Martinez and colleagues, who studied the ecological community the species share, hypothesized that there is an inverse relationship between birds' field of vision while foraging and their sensitivity to alarm calls from neighboring species.
Which finding, if true, would most directly support Martinez and colleagues' hypothesis?
When Martinez and colleagues played T caesius alarm calls, M. barbatus and P. saturatus displayed no reaction, whereas T. caesius displayed predator-avoidance behavior.
A
Many local bird species with similar foraging habits to those of M barbatus displayed no reaction when Martinez and colleagues played T. caesius alarm calls, whereas M. barbatus displayed predator-avoidance behavior.
B
Some individuals of P. saturatus displayed predator-avoidance behavior when Martinez and colleagues played T. caesius alarm calls, whereas nearly all did when M. barbatus alarm calls were played.
C
P. saturatus displayed no reaction when Martinez and colleagues played T. caesius alarm calls, whereas M. barbatus displayed predator avoidance behavior in response to the calls.
D