单选题

　　[填句补文]But Bali starlings are only found in a small area on the island of Bali in Indonesia. They live in the tall grasslands near the coast. ______ Today there are only 14 left in the wild on a single reserve. More than half of their habitat was converted into farmland， and forest plantation. Many of them were captured and sold as pets.

　　A、We should take measures to protect them.

　　B、Bali starlings are very beautiful birds.

　　C、They grow fast because of a protein rich diet of insects.

　　D、In 1984， there were only 150 birds left in the wild.