阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。
A
When you see geese flying along in V formation, you might consider what science has discovered as to why they fly that way.
As each bird flaps wings, it creates an uplift for the bird immediately following. By flying in V formation, the whole flock at least 71 per cent greater flying range than if each bird flew on its own. Individuals who share a common direction and sense of community can get where they are going more quickly and easily because they are travelling on the pushing force of one another.
