The person who merely watches the flight of a bird gathers the impression that the bird has nothing to think of but the flapping of its wings. As a matter of fact, this is a very small part of its mental labor.

Select the analysis statement the quote would best support

. A.Wilbur Wright uses the bird as an example of what people thought of their work on flyers.
B.Flight is as simple as flapping wings.
C.When watching a flight it appears there is little effort
. D. Birds, like humans, spend more time thinking than they are often given credit for.