How Have Environmental Concerns Affected the Prior Appropriation Doctrine

How have environmental concerns affected the prior appropriation doctrine?

A) The prior appropriation doctrine has not been changed or affected by environmental concerns because of its common-law status.
B) The prior appropriation doctrine is pre-empted by environmental laws.
C) Courts have been balancing environmental concerns with the prior appropriation rules on water ownership.
D) The U.S. Supreme Court has eliminated the prior appropriation doctrine under the Arizona v. Colorado decision.