Question

marbury v. madison established
the principle of judicial review.
the ability of the federal government to regulate interstate commerce.
the authority of the federal government to hold \enemy combatants\ indefinitely.
that international legal principles are part of the law of the land in the united states only so long as the country signed a treaty specifically addressing such principles.

Explanation:

The landmark U.S. Supreme - Court case Marbury v. Madison in 1803 established the principle of judicial review, which gives the courts the power to declare laws and actions of the legislative and executive branches unconstitutional.

Answer:

the principle of judicial review.