Read the paragraph and answer the question.
Crows are very smart. To find food, they often make use of other animals, cars, and humans. For example, crows in Japan have been seen dropping hard nuts on crosswalks, letting cars crack them open, and then waiting for a red light so they can pick up the pieces. In North America, crows call out the position of injured deer to wolves. After the wolves have eaten the deer, crows then fly in to get at the bones.
Which sentence could be added to the paragraph without changing the tone?
Answer choices for the above question
A. Crows are beautiful birds that are not appreciated enough.
B. For these reasons, crows are often considered symbols of death.
C. The cunning crow, so easy to miss, is the most fascinating member of the animal kingdom.
D. Crows even learn the schedule of garbage trucks so they know where to find a quick snack.