单项选择题

From the article, we can deduce that the author ______.

A．is in support of the present policies
B．appreciates the present management techniques
C．thinks that the forces in nature should be altered
D．is strongly in favor of the natural processes

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单项选择题

According to the article, a population explosion of elk and deer was caused also by ______.

A．the adoption of a policy of aggressive predator elimination
B．the increased number of Nation Parks
C．the decreasing number of visitors to National Parks
D．the heavy exploitation of endangered animals in the 20 century

单项选择题

Which one of the following statements is NOT true according to the article

A．Park managers interrupted the forest ecosystems through out the 20th century.
B．Flesh-eating animals should not be eliminated.
C．Insect suppression may cause the forests to over-mature.
D．Severe damage to native vegetation in the forest is caused by fire.