50.According to the passage, which of the following statements is NOT true?
(A)Wildlife experts have found the causes for the disease.
(B)The west coast, isolated by mountain ranges, is disease free.
(C)Orphaned devils are in strict quarantine at the Wildlife Park.
(D)The mysterious disease is fatal.

Even by the brutish standards of Tasmanian devils, Rosie, Harry, and Clyde have led a lamentable life. A year ago, when the three were each the size of a sesame seed, they wriggled out of their mother’s birth canal and undulated their way to her pouch. There, each locked onto a teat and grew quickly. But within months, their mother developed devil facial tumor disease—a mysterious malady that in the last three years has killed nearly half of all the world’s devils, marsupials that are found only in Tasmania. Shortly after she died, the baby devils, grown to the size of tiny puppies, were found dangling from their mother’s pouch, starving to death. Rescued and reared by hand, Rosie, Harry, and Clyde recently joined six similarly orphaned devils at the Launceston Lakes and Wildlife Park, all in strict quarantine. The fate of their exotic species—Sarcophilus harrisii—may lie in what happens to these rambunctious youngsters in the next 12 to 18 months. “If they contract the disease, devils may be headed for extinction in the wild,” said a wildlife biologist. Right now, wildlife experts are struggling to comprehend the nature of the fa

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