[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.