Lucas is writing an essay about bird-watching. He has come across the following excerpt in “What Is That Bird?” by the US Fish and Wildlife Service: Studying the behavior of a bird is also often helpful in identifying it. Knowing characteristic bird behavior can be an important aspect of bird conservation and management, since erratic behavior can signal a stressed or unhealthy bird. Because birds move around a lot, they can be vulnerable to a variety of different threats.

What is the best way for Lucas use this excerpt in his essay without plagiarizing?

A.
Bird-watchers should note if they see birds doing anything strange, since erratic behavior can signal a stressed or unhealthy bird.
B.
Bird-watchers should note if they see birds doing anything strange, since erratic behavior can signal a stressed or unhealthy bird (“What Is That Bird?”).
C.
Bird-watchers should note if they see birds doing anything strange, “since erratic behavior can signal a stressed or unhealthy bird.”
D.
Bird-watchers should note if they see birds doing anything strange, “since erratic behavior can signal a stressed or unhealthy bird” (“What Is That Bird?”).