Which of the following actions could the state take to stop the implementation of this rule?

The state of California is concerned about a proposed
EPA rule change that would lower federal standards for
water quality. This rule would supersede California's
more stringent regulations and prevent the state from
enforcing its higher water-quality standards.

A The state could lobby Congress to impeach civil
servants who attempt to implement the new rule.

B The state could nullify the new federal rule in
California and continue to apply its own higher
standard.

C The state could threaten to hinder the president's
reelection campaign if the rule is not rescinded.

D The state could file a lawsuit in federal court to
overturn the new rule because it violates the state's
constitutional powers.