The USDepartment of Energy Is Responsible for Cleaning Up Nuclear Waste

The U.S.Department of Energy is responsible for cleaning up nuclear waste sites produced as a result of nuclear research programs and programs associated with the production of nuclear weapons.Which of the following statements is correct?

A) There are no disposal sites for the waste.
B) Most of the 100 original sites are still have cleanup in progress.
C) Yucca Mountain in Nevada is accepting much of the waste.
D) Most of the 100 original sites have been cleaned up.