Read the following: 'The Pacific tree frog can change its skin color from green to brown over the course of several hours. Researchers believe this adaptation serves primarily as camouflage rather than temperature regulation, since the color changes correlate more strongly with background environment than with ambient temperature.' What evidence supports the researchers' conclusion?
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A
The frogs change color very slowly
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B
The frogs are found only in the Pacific region
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C
Color changes align more with surroundings than with temperature shifts
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D
The frogs prefer green environments over brown ones