34. Thc passage suggests that Douglas fir trees are (A)a type of alder (B)a type of evergreen (C)similar to sword ferns (D)fast-growing trees

40. What is the author's main purpose in the passage? (A) To argue that alder trees are useful in forest management (B) To explain the life cycle of alder trees (C) To criticize the way alders take over and eliminate forests (D) To illustrate how alder trees control soil erosion