I really believe only possible choice is B. I think this is a horrible question though.
A - Network of blood vessels used for different reasons (say to breath). So A is true, but does not support the stem.
C - Clearly wrong
D - Clearly wrong
E - Ok let's say that it's true, heat generated by Sandactylus in flapping its wings in flight could not have been dispersed by anything other than the blood vessels in its wings. And then? Does it tell us that Sandactylus flapped its wings? Definitely not.
B
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A - Network of blood vessels used for different reasons (say to breath). So A is true, but does not support the stem.
C - Clearly wrong
D - Clearly wrong
E - Ok let's say that it's true, heat generated by Sandactylus in flapping its wings in flight could not have been dispersed by anything other than the blood vessels in its wings. And then? Does it tell us that Sandactylus flapped its wings? Definitely not.
B
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