阅读下列短文, 从给的四个选项 (A、B、C和D) 中, 选出最佳选项。
(2013·东北三省三校第二次联考，D)
Deception (骗术) is something that people do all the time, and it plays an important role in military (军事的) strategy. Now some researchers are trying to figure out how to get robots to do it, by looking at the behavior of squirrels and birds.
