The answer is B.
I just took this test, and this was the answer! I hope it helps you more then the other answer XD
B. Live in Trees
Animals such as Squirrels are Arboreal. <span />
The first rapid transit and the first fast mail line across the continent from the Missouri River to the Pacific Coast.
Scientist's study climates conditions by studying the problem and using different study's and text's on the product
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