【单选题】Why does the speaker say this: "I will explain how researchers set up their experiment, what its results were, and what those results can help us conclude about chimpanzees and ourselves"?
A.
to introduce a surprising conclusion
B.
to help listeners understand how she will organize the lecture
C.
to explain that she will discuss facts rather than opinions
D.
to emphasize the behavioral similarities between chimpanzees and humans