The koala is an animal native to Australia. Despite the popular name, koala bear, they aren't bears, but marsupials like kangaroos, that keep their newborns in a stomach pouch. They have developed very differently than other marsupials, in part because they spend most of their lives in the eucalyptus trees that serve as their main source of food. What adaptation helps them lead this tree bound life?

A) The use of pouches to hold koala newborns.
B) Grey fur that keeps them hidden from predators.
C) Hands, feet, and claws that are perfect for gripping branches.
D) Distinct calls they use to communicate potential danger to one another.