In the Western U

Multiple Choice

In the western U.S.,bark beetle outbreaks have become much worse than in the past for all of the following reasons EXCEPT _______________.

A) milder winters caused by climate change are enabling beetles to spread northward
B) warmer climate has resulted in increased reproductive output for the beetles
C) long -term droughts have stressed trees,making them vulnerable to attack
D) catastrophic wildfires have resulted in the increased growth of the kinds of trees that the bark beetles prefer
E) beetles are attacking the myriad even -aged forests throughout the West,which are the perfect age for infestation