Although the human population around the forestland in Middlesex County has increased, the amount of forestland has not been reduced. Therefore, the decrease in the county’s songbird population cannot be attributed to the growth in the county’s human population.
Which of the following, if true, most seriously weakens the conclusion above
A．As the human population of Middlesex County has grown, there has been an increase in the number of shopping malls built.
B．The presence of more garbage cans resulting from the increase in the county’s human population ensures the survival of more raccoons, which prey on songbird eggs whenever available.
C．There has recently been a decrease in the amount of rainforest land in Central and South America, where songbirds spend the winter months.
D．Although several species of songbirds are disappearing from Middlesex County, these species are far from being endangered.
E．(E) The disappearance of songbirds, which eat insects, often results in increased destruction of trees by insects.
，磨牙完全Ⅱ类颌关系，前牙深覆Ⅲ°，深覆盖Ⅱ°上牙列拥挤Ⅰ°，
缺失，上前牙唇倾上颌轻度前突，下颌位置基本正常，牙周情况良好。
和
和