Which statement best summarizes the passage?

A.
San Francisco politicians wanted an additional water source to support the growing population and planned to use the Tuolumne watershed.
B.
The complicated controversy over the potential development of a reservoir in the Hetch Hetchy Valley led to the creation of the National Park Service.
C.
Prior to the establishment of national agencies to manage protected public lands, federal troops were responsible for enforcing park regulations.
D.
The 1906 earthquake in San Francisco leveled much of the city, which strengthened the need for an additional, readily accessible water supply.