Refer to the Scenario Below and Then Answer the Following

Refer to the scenario below and then answer the following question(s) .
In a fossil bed, you discover the preserved bones of a winged animal mixed in with the bones of small rodents. The small rodents are known from other fossils to have lived about two million years ago, but they are now extinct.
-You examine the fossilized remains of the winged animal.Impressions in the surrounding rock suggest that the wings may have been covered with tiny hairs,which suggests that the animal is likely to have been a mammal.When you examine the remains of the wings,which of the following observations would be most surprising?

A) The animal appears to have five digits in each forelimb.
B) Several of the digits ("finger" bones) are extremely long, and look as if they supported a thin membrane.
C) The animal's wings appear to be much larger than those of any known bat.
D) The animal appears to have two upper arm bones.