Which of the following offers the best introduction to Paragraph 4?

A. Due to the elusiveness of this fascinating creature, many people across the world have never seen a Giant Panda.
B. The Giant Panda is now considered a true bear.
C. Despite the dwindling natural habitat of the Giant Panda, scientists still attempt to study the animal in the wild.
D. The Giant Panda remains a difficult creature to study in the wild.