National parks clearly needed coordinated administration by professionals attuned to the special requirements of these preserves." Which TWO details from the passage support this claim? a "The park's promoters envisioned Yellowstone National Park would exist at no expense to the government." (paragraph 4)
b "Through constant exploration, Norris also added immensely to geographical knowledge of the park." (paragraph 6)
c "Even when ten assistant superintendents were authorized to act as police, they failed to stop the destruction of wildlife." (paragraph 7)
d "...each of the 14 other national national parks established in the late 1800s and early 1900s was separately administered, resulting in uneven management, inefficiency, and a lack of direction." (paragraph 10)
e "Yellowstone's first rangers, which included veterans of Army service in the park, became responsible for Yellowstone in 1918."