Choose the correct answer from the brackets for each question. Arrowhead Uranium Company was one of the original uranium mining companies in the Cameron Arizona region of Northern Arizona, operating from 1952 to the mid 1960's at several different mine sites on the Navajo Reservation. The land where the mine sites were located was owned by the United States in trust for the Navajo Nation. The Department of the Interior and the Bureau of Indian Affairs oversaw some aspects of the mining permits and leases for the Nation. Permits were approved by the director of the BIA (an employee of the United States government). All money related to the mining was paid to the United States Treasury for deposit exclusively in Navajo tribal funds. For almost three decades, the Mine Sites remained largely in the same condition as when mining ceased, with open pits and waste piles on the properties. In 1975, Arrowhead was closed and its assets were bought by Lightning Mines. In the 1980s, the Navajo Nation became concerned about possible health impacts of abandoned uranium mines on the Reservation. People were frequenting the pits for recreational purposes, and livestock was watering at the pits. The Navajo Nation leadership discussed their concerns with the Environmental Protection Agency (EPA). As a result the EPA cleaned up the mine sites.

a. Arrowhead Uranium Company ran mines on the Navajo Reservation that extracted (uranium, natural gas, coal)
b. The land that was potentially contaminated was owned by (Arrowhead, the United States, the Navajo Nation)
c. Lightning Mines (was, was not) involved in the generation of waste.
d. The law that covers allocation of the costs of cleaning up toxic waste is (CERCLA, RCRA, Title VII) also known as the (Superfund, Cleanup Fund, Cleanup Responsibility Act)