Question

When did the U.S. pass the National Environmental Policy Act?

Answer 1

The answer you are looking for is 1969.

Answer 2

Passed by Congress in 1969 and signed into law on January 1, 1970, the National Environmental Policy Act (NEPA) broke new ground as the first major Federal legislative effort to incorporate environmental considerations into all government decision-making. Hope this helps. :)
Answer: C.