单项选择题

A．They will gradually die out.
B．They will be able to survive in the preserves.
C．They will have to migrate to find new homes.
D．They will face extinction without artificial reproduction.
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explaining
单项选择题
We learn from the passage that ________.
A．the population in the Pocono area is growing
B．wildlife in the Pocono area is dying out rapidly
C．the security of the Pocono residents is being threatened
D．farmlands in the Pocono area are shrinking fast
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