Question ID:PTJ2007 S3 Q9 Passage:Naturalist:  The recent claims that the Tasmanian tiger is not extinct are false. The Tasmanian tiger's natural habitat was taken over by sheep farming decades ago, resulting in the animal's systematic elimination from the area. Since then naturalists working in the region have discovered no hard evidence of its survival, such as carcasses or tracks. In spite of alleged sightings of the animal, the Tasmanian tiger no longer exists. Stem:Which one of the following is an assumption on which the naturalist's argument depends? Correct Answer Choice:DChoice A:Sheep farming drove the last Tasmanian tigers to starvation by chasing them from their natural habitat. Choice B:Some scavengers in Tasmania are capable of destroying tiger carcasses without a trace. Choice C:Every naturalist working in the Tasmanian tiger's natural habitat has looked systematically for evidence of the tiger's survival. Choice D:The Tasmanian tiger did not move and adapt to a different region in response to the loss of habitat. Choice E:Those who have reported sightings of the Tasmanian tiger are not experienced naturalists.