If you plan on going to Hawaii, don't bring any pets. Hawaiians are wary of letting in foreign animals. Yourbeloved Rex or Fi-fi could spend up to 120 days in quarantine. They have strict rules for importing animals. Theycarefully screen all incoming pets. Who could blame them? They've had problems with new animals in the past.       The black rat was introduced to Hawaii in the 1780s. These ugly suckers originated in Asia, but they migratedto Europe in the 1st century. Since then they've snuck on European ships and voyaged the world with them. Theserats carry many diseases including the plague. They are also good at surviving and tend to displace native species.That means that after they infest an area, there will be fewer birds and more black rats. Most people prefer livingaround birds.       Since their arrival in Hawaii, black rats have been pests. They've feasted on sea turtle eggs. They've eaten treesaplings, preventing trees from being reforested. And they've been a leading cause in the extinction of more than 70species of Hawaiian birds. They love to climb trees to eat bird eggs. They also compete with forest birds for food,such as snails, insects, and seeds.       Perhaps more troubling, black rats threaten humans. They spread germs and incubate disease. They are a vectorfor more than 40 deadly illnesses. Some think that rat-borne diseases have killed more people than war in the last1,000 years. Rats also eat our food. They eat more than 20% of the world's farmed food. And that's why themongoose was brought to Hawaii.       During the mid-1800s, the Hawaiian sugar industry was thriving. Americans were just realizing that they lovedsugar. Hawaii was pretty much the only place in America where one could grow sugarcane. But those filthy verminwere tearing up the fields. Black rats were destroying entire crops. What's a plantation owner to do? The answer issimple. Import an animal known to kill rats. What could go wrong with that? In 1883 plantation owners imported72 mongooses and began breeding them.       People revere the mongoose in its homeland of India. They are often kept tame in Indian households.Mongooses feed on snakes, rats, and lizards, creatures that most people dislike. They are also cute and furry. Andthey kill deadly cobras. What's not to love? Sadly, India is a much different place than Hawaii. When the mongoosesgot to Hawaii, they did not wipe out the rats as plantation owners hoped. Instead, they joined them in ravaging thebirds, lizards, and small plants that were native to Hawaii. It's not that the mongooses became friends with the rats.They still ate a bunch of them. But mongooses are not too different from most other animals: they go for the easymeal. In Hawaii they had a choice. Pursue the elusive black rat or munch on turtle eggs while tanning on the beach.Most took the easy route.       Now Hawaii has two unwanted guests defacing the natural beauty. The Hawaiians have learned their lesson.Talks of bringing in mongoose-eating gorillas have been tabled. So don't get uptight when they don't welcome yourcat Mittens with open arms. They're trying to maintain a delicate ecosystem here.
【題組】16. How does the author start this passage?
(A) With a story.
(B) With a policy.
(C) With a demand.
(D)With a question.