Although the human population around the forestland in Middlesex Count

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 rain-forest 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) The disappearance of songbirds, which eat insects, often results in increased destruction of trees by insects.