The Western Preservationists Suffered Their Worst Political Setback When

The western preservationists suffered their worst political setback when

A) the development of multiuse resource management became the guiding environmental policy of the Roosevelt administration.
B) private developers were allowed to cut off public access to the Pacific Coast beaches.
C) the city of Los Angeles built canals to bring water from the Sierra Nevada Mountains.
D) the Yosemite National Park was opened to motor vehicles.
E) California's Hetch Hetchy Valley was dammed to supply water to San Francisco.